Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf7fc0e640b9d67…

MALICIOUS

PDF

86.2 KB Created: 2021-06-11 06:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a09045a90a3e55a591c408b6fd218bf8 SHA-1: 42c47cb701c1ffbf69a3509fdd78a99cb3b3abdf SHA-256: 7bf7fc0e640b9d677f6034b41feacf1d61af5ddf09c6fe05a6197acfb304ab0d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malware or phish for credentials. The presence of a 'download' button heuristic further supports this, indicating a deceptive user interface designed to trick users into downloading a payload. No scripts were extracted, but the overall structure and URL patterns are indicative of a downloader or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://infrive.ru/uplcv?utm_term=command+and+conquer+generals+mac+free+download PDF link annotation
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d4779210f---64291969704.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/73700301180.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a533b6551c---dixezogagevolovelavanezak.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1baaa8ea3c---gotewidilazevejofap.pdfIn PDF document text
    • https://uniontend.com/userfiles/files/17178159156.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/3ca8173fd6a23ffdc8dd4d44970520a3/72594475791.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/3h4s5tf5rnph7sk4a7ucipe709/mikokozotugufozudikepa.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8020e19ba---defaxomakijipezolelure.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71ab9a22d2---44776226214.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c204c3c91fe---fejalaxagawawafatevugi.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/ccd351e5b8f34c32e8cc5d97d8a336b3/zasokasuxujap.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3cb800445---79140525694.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/tudigizutadid.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/bimiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000125d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x125D5 16648 bytes
SHA-256: b8dcf42e419ccd872c48157d09cbad3c70bc1daba7e08ba5883eda575116ab66
font_00_sfnt_off0000ee37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 5336 bytes
SHA-256: 4a88773069777c97458f2df1c724be25207f9a3f0c396d7ff255bbdf75264442
font_01_sfnt_off00010043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 10948 bytes
SHA-256: d6181bdedf9481a1b73d4ac0e93997a356249e519d8f79b3eec29b87b524e7b8
font_03_sfnt_off00013cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CFC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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