Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afbdbeccc129406…

MALICIOUS

PDF

70.5 KB Created: 2021-01-17 22:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a9356f2708fc727dd211941a5c06368c SHA-1: d1c6de5b3aa722e43793e80e2ab5338a37883942 SHA-256: 4afbdbeccc129406fba77fca2a21f6de041123362ecc8a8ddc1056d5b0f9ce46
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though partially corrupted, references 'Golden era bodybuilding training', likely a lure to direct users to malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/123?utm_term=golden+era+bodybuilding+training PDF link annotation
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/buvipulezu_gosoguj.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/jiiiihv/ding_ding_gori_kavita_dakhva.pdfIn PDF document text
    • https://cdn.sqhk.co/wafizogep/Igghi3B/radio_online_live_free.pdfIn PDF document text
    • https://site-1168020.mozfiles.com/files/1168020/grade_2_spelling_games_free.pdfIn PDF document text
    • https://site-1205690.mozfiles.com/files/1205690/subsegmental_pulmonary_embolism_chest_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/bixatavafut/ihojfif/norapot.pdfIn PDF document text
    • https://site-1178514.mozfiles.com/files/1178514/56007919741.pdfIn PDF document text
    • https://cdn.sqhk.co/pinufizugal/coihhdU/71992110553.pdfIn PDF document text
    • https://cdn.sqhk.co/ninoporaleva/thcZZgi/sowiwufagezi.pdfIn PDF document text
    • https://site-1171555.mozfiles.com/files/1171555/sopatokoruwobamevag.pdfIn PDF document text
    • https://site-1217839.mozfiles.com/files/1217839/anti_social_social_club_template_psd.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/hiaggif/cytus_2_vanessa.pdfIn PDF document text
    • https://liwetevafiwa.weebly.com/uploads/1/3/4/0/134096648/zevam_dexegizamun.pdfIn PDF document text
    • https://site-1172776.mozfiles.com/files/1172776/85180709838.pdfIn PDF document text
    • https://site-1243998.mozfiles.com/files/1243998/tekivunurubosef.pdfIn PDF document text
    • https://cdn.sqhk.co/wazofovam/IYjaJii/xafafowawifazobugitesepir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tirinito.epizy.com/67576425179.pdfIn PDF document text
    • http://kunivoji.epizy.com/diablo_2_best_merc_guide.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_off0000d8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E6 5088 bytes
SHA-256: ee660abd84e69222aa3cdd2761b9773061bd170ad9f7001b006a9c4358220a1c
font_01_sfnt_off0000ea4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4B 10172 bytes
SHA-256: 2918e311761226468f63f1cbefb6b5661ce3deb5078b5d7fb27c37a84003081c

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