Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec9382e76d996c3…

MALICIOUS

PDF

86.6 KB Created: 2021-09-01 05:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 67c200cc18534212ec0c7b5d3325d239 SHA-1: 71ddfdbc7739713574ec6aec2cdb4b3f322ecdf2 SHA-256: 9ec9382e76d996c3abd092bcaf687a96fac0824f0033ec3ef539e1e5a5f98459
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of an IP address literal in a URI further supports a malicious redirection scheme, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://aiswaryamatrimonials.com/fck_uploads/file/nifilixebumafiterivado.pdf In PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/fcfffa74d655b81badc50af3e15bacea/84860269172.pdfIn PDF document text
    • http://topas.lt/userfiles/file/92057594116.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/61246386891.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611155cef277c---dejolanusojimodonujita.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/nukosupugedaruga.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/7127562189.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/32675347832.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/74994897434.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/gubiguvedarekisuvi.pdfIn PDF document text
    • http://southeastern61.com/clients/0/07/0748cf78e2268043913ae7c14e09e996/File/25917294605.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/xuwowur.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/doxox.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608572ab4f09b---36737541114.pdfPDF link annotation
    • https://soechi.net/userfiles/file/67999599255.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607754f988201---lejudup.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/10348878464.pdfIn PDF document text
    • https://resicolor.com/upload/files/8947332569.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/be932c84d728cabad9b3fcb3c6c7d27f/vevibinapi.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/15388a88d6de64afe28d32a8958f1b86/42428420082.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/c0e042fb5d13d4ce8c7a10c63e559225/71884324061.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/36860721984.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/sigiparu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=what+does+tcs+stand+forPDF 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_off0000ee69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001067b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067B 18120 bytes
SHA-256: 16a7359a5cd9ba00c9ce57728e31a42093aba3b445587734e174e9436c408972
font_02_sfnt_off00013552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13552 10428 bytes
SHA-256: efcd1b25e2d46861a903c56e01eb3c99e6325fa78f327bf8687f22d3130ea9eb

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