Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1172d525bcf3a80…

MALICIOUS

PDF

95.5 KB Created: 2021-08-23 14:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e6766ae436feb0a53d15de8f07032628 SHA-1: 40ad266854ad20f57e0b751d1532600743d7bd2a SHA-256: e1172d525bcf3a801091dd79b4c665aa77a9749ca2bd4b12267f3e518aaa98ca
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://drafthe.ru/uplcv?utm_term=stereochemistry+at+tetrahedral+centers PDF link annotation
    • http://world-green-hope.com/uploads/files/63098449138.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/38003100890.pdfIn PDF document text
    • https://aedwea.com/upload/foto/59157517833.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c91fb7b698---sukipafag.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/ecebef3e3d13dfc47c166f71d0621472/22946697769.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/37594958608.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/61747959857.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/2f372d203297f1e465e4a906c7a56eac/wumawozaz.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/36286562858.pdfIn PDF document text
    • http://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/42734710806.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/noxotumuj.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4712dd439---fimujuzovovejabidopixu.pdfIn PDF document text
    • https://quangcaoxetaxi.vn/upload/fck/file/fapukukifivijufej.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e442b4af864---gofanukufam.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/lagatixagejiviwug.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/lamideduresijedigo.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab04a35825c---89722566288.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021630838235322.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/lqpdhuti50uvtt631rb7e033e5/55839590460.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160810e8fdc6b5---kuzejifevazufati.pdfIn PDF document text
    • https://mmszke.hu/files/file/dokip.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/nolud.pdfIn PDF document text
    • http://bakoca.hu/files/file/34207661168.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/f995hk8qp40pjjij31g26mtrrd/depalevisuvogujajulasegam.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_off0001127d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127D 16848 bytes
SHA-256: ec687479969fe30510adc52b55c46a5c2f2f39f69b66c67721b2802f3b61442a
font_01_sfnt_off00013e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9F 10824 bytes
SHA-256: 18c4ee14fa85c1c00aa98f8b0a52faf893bee9b809d7eae39b546915ffe8e3ac
font_02_sfnt_off00015763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15763 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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