Malicious PDF — malware analysis report

Static analysis result for SHA-256 982e0a939f368d19…

MALICIOUS

PDF

77.5 KB Created: 2021-02-19 00:27:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fc25bc9755334e6f4c34d0f6fe1a95b6 SHA-1: 186818012c2309fc92fb74339a88578786c2e243 SHA-256: 982e0a939f368d19965ef467ab4d3f9e0439c561b61c943840d33d687492ca41
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/123?utm_term=stretching+anatomy+pdf PDF link annotation
    • http://piroluzufu.iblogger.org/61987187509.pdfIn PDF document text
    • https://xitujufos.weebly.com/uploads/1/3/1/4/131483255/nakitu.pdfIn PDF document text
    • https://cdn.sqhk.co/mesodimeduje/7dheiar/paypal_app_login_problem.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/jziiHel/wolfquest_3_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/bYAVoif/diary_with_lock_app_apk_download.pdfIn PDF document text
    • http://perevod24-card2card.site/94741079088b8i7o.pdfIn PDF document text
    • http://lidedapomegila.iblogger.org/beautiful_life_ost_goblin_mp4.pdfIn PDF document text
    • https://fowowudajij.weebly.com/uploads/1/3/5/3/135312379/7eb984b4.pdfIn PDF document text
    • http://drilltech.info/need_for_speed_no_limits_gold_hack_ios6968w.pdfIn PDF document text
    • http://helpforteam.com/75756015355uox7h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiguvazigavis.epizy.com/salient_features_of_sustainable_development.pdfIn PDF document text
    • http://ranajugupavogoj.rf.gd/70629708700.pdfIn PDF document text
    • http://pedijuwugeta.rf.gd/86439733810.pdfIn PDF document text
    • http://wesokojoposad.epizy.com/android_notification_not_visible.pdfIn PDF document text
    • http://nadurajamewe.epizy.com/93195481743.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 5564 bytes
SHA-256: 2e2171baa3ca61b194bb25dd29b301a28b66e4c238b501748acdf00ae17a2754
font_01_sfnt_off000105c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C9 10484 bytes
SHA-256: 0ac41c68b45da66d475bdf13f7070d2742b33722e9f6530882bd27350d7a1937