Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbfa95932ce5d8da…

MALICIOUS

PDF

78.4 KB Created: 2021-09-08 00:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 03dcfe96fd768c3c1f4d96db9fd28921 SHA-1: b9b0af0024f69a1c744a1a8e28ed3132a8ad2456 SHA-256: bbfa95932ce5d8da7724f6be3d053f498c9f41f5b2c5379d34d24fd84bb91867
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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 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://shop-ecobati.com/medias/upload/files/zopanopigufadajaxokix.pdf In PDF document text
    • https://ferdavagnar.is/images/fck/file/49935137647.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/ddac030df142062f9e918bf352e10aef/suxipuduziziwivexolojizu.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/nojetepabuzevuli.pdfIn PDF document text
    • https://keepingscore.org/userfiles/file/zitikizulimejanakeromuv.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/48e1d0f31961f2a01b07ad0c73a65d44/guwunikubotufonirejoko.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fcb8a140486---69506508987.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/82856482542.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/wixewefeboxe.pdfIn PDF document text
    • https://rezgame.com/calisma2/files/uploads/sisoduvigupifufinibi.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/c1344782ca75815008a764429ff1d466/36342319756.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/7cf441e22545f44869e551b5e0d7254c/patuvipitarewewitakisomi.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/sasosawewoxemaw.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/d76fa268199ec969fbfbcf84988f12de/76293764420.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a8a453d1f---xebopapupaxipol.pdfIn PDF document text
    • http://mcleod-bobbitt.com/clients/64742/File/61100141316.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/c39aac28157afcc81c6d87631fd9b9a1/20988248165.pdfIn PDF document text
    • http://bankerz.in/qpic/files/33383352794.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/zajonowugugigobatufamija.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/25357043793.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5261288891.pdfIn PDF document text
    • https://oferta.lt/i/File/18851302814.pdfIn PDF document text
    • http://aweibel.com/Photo/file/davaruw.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/46a7739c605aadcc6a2ae48e67dda72c/38377591381.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=business+plan+restaurant+sample+pdfPDF 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_off0000d1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AA 16200 bytes
SHA-256: b3c8e1e4d905d5e5cdcc7518d92a5b13bc73d0a38315d9f3a5a041f871fad9dc
font_01_sfnt_off0000faf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001130e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130E 10692 bytes
SHA-256: 11697811bf53e51a6e6322be294c13b25598d7ed7627fdbf3017909bf0c4e5de

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