Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df64febf1673f99…

MALICIOUS

PDF

73.7 KB Created: 2021-02-22 22:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3df66d6c6f04a4050146efee99c8ad52 SHA-1: 7749921e277bb5d19ba40263a7a5517f3fe61f7f SHA-256: 6df64febf1673f990aefd8de878ce6fae139d400f98b275fe12074f8c148b562
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to product lures like 'Casio forester watch strap', reinforcing the phishing pretext.

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://bologen.ru/123?utm_term=casio+forester+watch+strap PDF link annotation
    • https://cdn.sqhk.co/pipujevi/hhj6gc3/doom_2_maps_download.pdfIn PDF document text
    • http://walletelectrum.buzz/10623879511flwuq.pdfIn PDF document text
    • http://delayikapy.xyz/metformin_500_mg_twice_a_day_diabetesio4pa.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/hiAXieE/lufokepixij.pdfIn PDF document text
    • http://amsidisi.xyz/98148828521nv5kn.pdfIn PDF document text
    • https://cdn.sqhk.co/vikaxokaso/getyhib/bizinogem.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/aHbhjkV/tisuzen.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/xininotx9q0.pdfIn PDF document text
    • http://24goodstore.site/73230405713cavb2.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/ibDBzid/twilight_blood_romance_otome_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kovoxajinuf.epizy.com/cho_gath_beginner_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/agent_sai_srinivasa_athreya_bgm_audio.pdfIn PDF document text
    • http://malukofe.rf.gd/6322954429.pdfIn PDF document text
    • http://rexawego.epizy.com/rebipitod.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_off0000e3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EC 5068 bytes
SHA-256: b70e4d303fc042535161799f1555171e46791f41acee321f717ef2ed5698de10
font_01_sfnt_off0000f538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF538 10920 bytes
SHA-256: 811f8a9e77c49d704c55c3a20d2563d79ede970fecb8d9b4e1ebfd8340f7e5e0

Open this report in the interactive analyzer, or submit your own file for analysis.