Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ddbae2256aad32a…

MALICIOUS

PDF

83.5 KB Created: 2021-09-02 06:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cb5998c5719935976bfe47a08d8aed0d SHA-1: 234114d994fcbc10bfd34fe9a049943c28b2d32c SHA-256: 9ddbae2256aad32a60cbcb9f9a6580e623e5d6d7b59f7770a51d8ab0014c1ce5
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on disposable domains or compromised CMS upload directories, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious content. While no scripts were directly extracted, the structure and numerous external links point towards a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lesfeesdelhetre.fr/upload/files/sukirivotomuk.pdf In PDF document text
    • http://carraracucinecomponibilitrapani.it/userfiles/files/luvodaxejaboriwozapidap.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd059c09043---lelajanivijakawejisit.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/ruguribaxorenip.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611ff26b376ca---tezolesaxiku.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/9093106fe4259b924f94bc7bc40e5e28/masugulitejazeg.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084ce1c024d3---kedosovinazajokofizu.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/fb0f849ade0413c2bcc1cb594788426b/sekixulopusigowumumuj.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/82497030505.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/mebololuwoxosi.pdfIn PDF document text
    • http://web68s.com/upload/files/buzozi.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/63862571752.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e107fbec37b---68965890071.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/1ab65745516163600908a5c8c140d5fa/44910245822.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/10251609704.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/deeb3ae0d9c85c17438d94e3992a7a0f/kepefakupudopawubo.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/polid.pdfIn PDF document text
    • http://gewald.ru/content/Files/19557620256.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b834b56e3f0---zanexogujiwisexu.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/zowawunukunazanirekejat.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/65658276280.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/6374ffafe79b2c510d9a8db05f84f37a/lozapifazowirutinobixozi.pdfIn PDF document text
    • http://446888.top/userfiles/file/famunoga.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/51456124638.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/5a187c9c6031ab2d28dd1b3a8510b556/gixitopog.pdfIn PDF document text
    • https://rintrans.com/files/lelumezazopate.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ac72226f3---87947701231.pdfPDF link annotation
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=download+adb+and+fastboot+for+windowsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A7 10440 bytes
SHA-256: f0ed101d7d163b2f3de6ba361d4e2b8bcaf173a324ad7e0be0762319a098f8c9
font_01_sfnt_off0000fb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB74 17040 bytes
SHA-256: 28bfd52045ff12fa037dfcb1b7dfe2d38ba905dbe251a2e415456037ec5149a5
font_02_sfnt_off00012783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12783 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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