Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea23141f2c4b56ce…

MALICIOUS

PDF

100.1 KB Created: 2021-06-07 08:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 06baf6629a7e920dfe66a6098cc1821f SHA-1: 0d9378bf8875f6e064c175cd652bc55d7c70aa52 SHA-256: ea23141f2c4b56cec4e78f730692afc24f7c806b5931aad288bfd37da6d0898e
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, a common tactic for distributing malware or directing users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The embedded URLs and the structure of the PDF suggest it's part of a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://garglob.ru/pbw?utm_term=the+emerald+tablets+of+thoth+free+pdf PDF link annotation
    • https://savibivo.weebly.com/uploads/1/3/1/3/131381036/869c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454971/normal_604f2d3a15a08.pdfIn PDF document text
    • https://kanuvufera.weebly.com/uploads/1/3/4/5/134591059/1e7036b57de615.pdfIn PDF document text
    • https://mirotimazafisel.weebly.com/uploads/1/3/4/3/134352803/bagerisali_xalilelopafowog_piputa.pdfIn PDF document text
    • https://ponuxarazuzega.weebly.com/uploads/1/3/5/3/135328107/971026.pdfIn PDF document text
    • https://fobabugukejapa.weebly.com/uploads/1/3/4/5/134576868/6057ca.pdfIn PDF document text
    • https://ridegagix.weebly.com/uploads/1/3/4/6/134668883/b7f61b40f4.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4377407/normal_60b3e6649e12c.pdfIn PDF document text
    • https://vorexumezekadan.weebly.com/uploads/1/3/0/9/130969740/5799235.pdfIn PDF document text
    • https://dapijapivabug.weebly.com/uploads/1/3/4/3/134338952/lawubujiteg.pdfIn PDF document text
    • https://gekalizafazidej.weebly.com/uploads/1/3/4/6/134699032/simur_kozizuj_sumunoma_boredakilajadu.pdfIn PDF document text
    • https://domemasajexal.weebly.com/uploads/1/3/5/3/135304114/mulosenixiz.pdfIn PDF document text
    • https://tebixuku.weebly.com/uploads/1/3/4/5/134595315/8031354.pdfIn PDF document text
    • https://sewuvemap.weebly.com/uploads/1/3/4/3/134377394/laxobudixi_kevezu_vijupozuzogipi.pdfIn PDF document text
    • https://medekokimezud.weebly.com/uploads/1/3/4/7/134748457/mezuvakemobus.pdfIn PDF document text
    • https://nategenuniko.weebly.com/uploads/1/3/4/7/134749174/mapirize-poxixale-vusagejupup-nurinimiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6714094a-ca7a-4938-9ac6-1a2f738a0bc7/tekal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5ac536-e0fe-43e1-b1cd-2360bf6b043d/minecraft_bedwars_hacks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44da886-9d75-43c0-8a22-f0a6253beb0e/9576551272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f3237dc-7363-4262-ad9b-0c5f3c5cf7bd/99304159307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/482308d3-19e9-43d7-8b98-5ab9e74e619a/suduvesujaf.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
    • 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_off00012a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6D 5372 bytes
SHA-256: 1708844f5281f883334a375f6305169c283a042d8aee235a75ce2b648a3a5111
font_01_sfnt_off00013c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C75 14348 bytes
SHA-256: bf49eb3fd3f8a833fa050a36df19d7bfb88dc0fad3aa2fae5719bcd294723c87
font_02_sfnt_off000167e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167E2 17664 bytes
SHA-256: 162f23ee7589d416134d8ef8d5e1263c1206568875aab5faf8f15558790b08a8