Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd174659e838234…

MALICIOUS

PDF

81.7 KB Created: 2021-08-22 01:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 0d593043030ee43f1a227b4f25d0b778 SHA-1: b78c689e4308249ca11fe4af5abbc7014efbb8b7 SHA-256: 0fd174659e8382345c97a38bcd90eabf2450faec4d705872be2b7f9397160dba
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://daivupaint.com/img-chamthi/files/gakasotimogimavogija.pdf In PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/9utoc3kirljhmqlmmmalcb1vcj/numude.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/lanovigavinu.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/81528737572.pdfIn PDF document text
    • http://sunnysidehighschoolclassof59.com/clients/867562/File/74995301205.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/88163119318.pdfIn PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/gawidefifanovulope.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608257f3a0db6---43930192153.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4f0f5553d3---sadipumazoxavo.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/pabosizejivowejovur.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/ov0gu6b3o6luj508cg4rl1f676/vapanakoli.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/mogiweluzobajerofupib.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/43635314477.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/sonox.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/18390470278.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/1f21e94d2b0a85eb250802c47135c6ff/2012590239.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/60706043679.pdfIn PDF document text
    • http://ghgunclub.com/clients/f/f3/f3036db30fa8ed97f94f648fc77c1040/File/fafujamubegogoj.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/5au9fjvm60ai9kt1fbojru0504/mesesemugukasevunoru.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/14302500000.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/xodukuvosekonovuze.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/najeletu.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/86301953922.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/punutejobubipekanodimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=descargar+minecraft+launcher+team+extreme+1.14+4PDF link annotation
    • 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://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_off0000da3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3F 18388 bytes
SHA-256: 1ff9b9d571c427c34db56f25b24612cb2d42f95ec20972b1ed89d02bba229668
font_01_sfnt_off0001091d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091D 11060 bytes
SHA-256: 0e53b2e99aa8d5bacae9680cd5c5b4e99909af6e7106f0477a6d72b985a4f2b9
font_02_sfnt_off000122d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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