Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f6f95dde5e6208…

MALICIOUS

PDF

82.7 KB Created: 2021-08-24 14:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 897bc294065030a63fc593126158d063 SHA-1: ef47ecdc8de7d7f6c81a2d57359347c6e8d80f6b SHA-256: 93f6f95dde5e62085498a060321927d0eb5b299daae7a7ecef940819c89b66d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. Heuristics indicate the presence of a link farm with multiple distinct hosts, suggesting an attempt to obscure the final destination or distribute payloads across various compromised sites. The embedded URLs, such as 'https://philabc.ru/uplcv?utm_term=sources+of+homoeopathic+materia+medica+pdf', are likely used to lure victims into clicking and potentially downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://philabc.ru/uplcv?utm_term=sources+of+homoeopathic+materia+medica+pdf PDF link annotation
    • http://rbtyutj01.com/userfiles/files/pepidobak.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d16a8c235---19408909546.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/betasupawogumiluwineki.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/7b139c13eb33d509fb24c4a7eb23767c/3571693724.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/77789821722.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/nuwuzinaxalorogu.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/pevuzowoledudefimedula.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/eb607249e4fe9d1cadbbd808cb846696/ragapidurixatuweju.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/pilote.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8354662b8---zemafiviweminonumuv.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bc3dc0517---xoludejepakadeka.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606efea368c28---47728995493.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/046d503c86bf726fe57d7dc0480f4a6a/59773587349.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a265355adba---dosaxizifakid.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/pilajadusubu.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/41264333692.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210511230023_1650091448.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/12777380320.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/885okl2javs3r7c2sisdv1nm11/foros.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/93023362201.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/1iuimgrld6pr9uq2kovsj7pp07/towiku.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4894db6323---76832924493.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7E 10908 bytes
SHA-256: 2f6c50854b02833cac3062f9298d673cd2ab4f8f32d47f5b7a32ba771d85f742
font_01_sfnt_off0000f6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED3 17440 bytes
SHA-256: 89caca895c9dbf2720f63eb8a5a6baff99afa6527978256f154249a1fb1ea4e3

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