Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c6d38784cdca0d5…

MALICIOUS

PDF

89.4 KB Created: 2021-10-08 04:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8e915e1727b9028195e38ef7f9c30dce SHA-1: 4233a496a4d545e47719b002f5ebcc1b32dffda0 SHA-256: 2c6d38784cdca0d5b3c0e22ed37b8b93612fd025b48f430b346e804645d7387a
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous URLs pointing to compromised websites and link farms, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URIs indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pixomot.ru/uplcv?utm_term=vaginal+dryness+after+period PDF link annotation
    • https://0286869143.com/editor_images/files/zemitimokuwizaliz.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/38249899172.pdfIn PDF document text
    • https://promoform.coreform.it/uploads/file/jenofegox.pdfIn PDF document text
    • https://camphacement.vn/upload/files/madobazor.pdfIn PDF document text
    • https://novsport.com/content/File/zelofolosidukafisiwaj.pdfIn PDF document text
    • http://descanso.verareyes.com/ckfinder/userfiles/files/gezasuxapekuvapadiruwon.pdfIn PDF document text
    • http://arniuniversity.in/ci/userfiles/files/livem.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/81010703241.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eece614735---naxagezakid.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/37735286239.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/37184684770.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615cd915c8fc1---tijogotalabinazig.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/jipesomebowelipunok.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/fexojepukipilogiganuxeri.pdfIn PDF document text
    • https://blugarden.eu/file/lojimozivazewawok.pdfIn PDF document text
    • https://eastoncn.housemember.com/uploads/files/vomasodem.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/tunefazivavigobi.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b360d5c09f---43426856673.pdfIn PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/1003701606.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents/files/zuwotupadaxapafupef.pdfIn PDF document text
    • https://dhesient.com/media/xozobibijewi.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/60935417606.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/lojawawutufavirazosarane.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a1c986682c---negewovajujobeladulo.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/89165491324.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_off0000f4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB9 19416 bytes
SHA-256: d0e309f71722cd3c38a1c0d57d101dbf677b2e76ff441f7db5defc263c2986e0
font_02_sfnt_off00013f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F16 10756 bytes
SHA-256: f7e2aea3c5e5f46aa692d70eef1e464d8d61353b4344534dd21288d8c5cb8a1d

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