Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8cf299d28b2719b…

MALICIOUS

PDF

90.8 KB Created: 2021-02-25 04:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8330d42774f8d49dd2c75c00281530ba SHA-1: 118bda894805ac39e0a81df488c57ab344aad64e SHA-256: b8cf299d28b2719be137e5bbd550b0d74d74ba2291f791044f9860b10c48a701
156 Risk Score

Malware Insights

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

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 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.
  • 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://crophysi.ru/123?utm_term=program+management+and+project+management+difference PDF link annotation
    • https://zunepijubu.weebly.com/uploads/1/3/3/9/133986973/kigipofumo.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/fiffKae/the_name_game_song_lyrics_american_horror.pdfIn PDF document text
    • https://bubigijezifaju.weebly.com/uploads/1/3/1/3/131380429/f65cded8c92b1.pdfIn PDF document text
    • https://zelogevoge.weebly.com/uploads/1/3/1/4/131483318/c9cd4cf9bcb89.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/idhdDjc/pejil.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/hgijNjj/75374380250.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/nebaperiwedemunajin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/97176411237.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/bhajan_video_tinyjuke.pdfIn PDF document text
    • http://monigadukuze.rf.gd/b._ed_form_2018_hpu.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/antivirus_avg_gratis_para_android.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/vegaxedugeguruzugedip.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/girona_game_of_thrones_guided_visit.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/75236306732.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/examen_ser_bachiller_2018_resuelto.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A0 5340 bytes
SHA-256: 92fc3da3b148267e2a50b15c3884788e08718fb05e782dc428765a8f1fa8d3ec
font_01_sfnt_off000137bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137BF 11200 bytes
SHA-256: e72b5dd4b1530c8e666ed422cb6d260fb0dd2113d8182c0f03d537fceefc9a89

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