Malicious PDF — malware analysis report

Static analysis result for SHA-256 4670263fca729fd3…

MALICIOUS

PDF

79.7 KB Created: 2021-06-22 18:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 07a1c4b260ee712b9b6b75fdcc37cba4 SHA-1: 75d452676cc681ed7f8ff906974b085c1003c433 SHA-256: 4670263fca729fd3a3ddf624557605c6d43f3d5f6e1125a21dad0d902a6ed53f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm or SEO poisoning tactic. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://allytemp.ru/uplcv?utm_term=latest+filmywap+movie+download PDF link annotation
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/25aebad3c9bfde733af6b9f402b420f8/44486296514.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/dudurizavi.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/a8b9ee09365afca1bc95a464bbf68a8c/zoboja.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/zudoxu.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/xixozoduxar.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/18799236488.pdfIn PDF document text
    • http://imreelectric.sk/uploads/file/pegukifinufawifid.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/2983206f11da08274f98bfd4ed35e90f/pulesadisagoj.pdfIn PDF document text
    • http://alkanboya.com/files/file/%5C/vawexamopemolenoro.pdfIn PDF document text
    • https://renetravel.ro/images/files/purixavir.pdfIn PDF document text
    • https://isleo.com/i_photos/file/53005674291.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/e5iak29tpa8ee8puvu8ematir1/pitomazujibo.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/vnu78kkq30bmhv9g52nj14g20v/24048560767.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/bapegidotibukezaguku.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/rgarirk98utpaj18mb349ipgf5/96402016983.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/lk6cfclpfj39pd175mme7cj9se/botavugizelojiradobudab.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE52 5076 bytes
SHA-256: 244cc9ec9546f46e8036711c7044d6d5c44eff98ac7448d556fe99522087bb4b
font_01_sfnt_off0000ffa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA1 10648 bytes
SHA-256: b2e88404c19be727c8003c9b8dd826b68d1a45c0cc330818150a57c3d7794393
font_02_sfnt_off000123d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2