Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea6a5ab3fcaf583…

MALICIOUS

PDF

92.9 KB Created: 2021-06-03 14:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c80ffae35aa074bfe4fb093402e71ad3 SHA-1: 211748fee3251dda342530788d36043bde46352b SHA-256: 0ea6a5ab3fcaf5832a418c4df915e433b9ac19ceb1745e98350c1551d11b378b
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external links to disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. While no scripts were extracted, the presence of many external links suggests an attempt to redirect the user to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pistant.ru/pbw?utm_term=eft+gunsmith+part+3+150+recoil PDF link annotation
    • https://xalovediluf.weebly.com/uploads/1/3/1/3/131380345/jusovepulivudidajom.pdfIn PDF document text
    • https://lurugidapu.weebly.com/uploads/1/3/4/3/134315770/mazuvig-wowekegenalubo.pdfIn PDF document text
    • https://gejewesogoj.weebly.com/uploads/1/3/4/6/134612034/sokajexadokise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411479/normal_606d959cc153b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380675/normal_606a7abee4d42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_601c997b1cbc0.pdfIn PDF document text
    • https://vipekisurular.weebly.com/uploads/1/3/1/4/131453387/340702.pdfIn PDF document text
    • https://xubebivox.weebly.com/uploads/1/3/5/3/135392957/72a1cfa8acc875.pdfIn PDF document text
    • https://zakisegozazamig.weebly.com/uploads/1/3/4/3/134346543/af150a1e.pdfIn PDF document text
    • https://kumaneke.weebly.com/uploads/1/3/4/6/134682587/1498022.pdfIn PDF document text
    • https://rejosunofefi.weebly.com/uploads/1/3/0/8/130874376/40751956e17123b.pdfIn PDF document text
    • https://fatononatigomun.weebly.com/uploads/1/3/4/8/134846471/68d97c4ee7cde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467274/normal_6059a5ab3203d.pdfIn PDF document text
    • https://lijonalorobu.weebly.com/uploads/1/3/4/3/134340538/rudisanuponut-robiz-jawefiniwuj.pdfIn PDF document text
    • https://rogewakaz.weebly.com/uploads/1/3/2/8/132815912/merawoxazew.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/5722627.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xibosini.pbworks.com/w/file/fetch/144511488/deepthi_shetty_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a52e74fe-cfb1-46d8-967a-e8181e4df79b/74510091736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/877cd484-29c6-48ec-89be-fdef651826ec/25050438983.pdfIn PDF document text
    • http://wuvebag.pbworks.com/w/file/fetch/144427998/40457001610.pdfIn PDF document text
    • http://bezawagiga.pbworks.com/f/luroloruleb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d172a6-8316-471b-9444-9dc535d695cc/91748677888.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_off00012af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF4 5868 bytes
SHA-256: f3e74a10d3a7c1963910799cf4ddd8f2a0e9ef065f509033b647236fd478bbb3
font_01_sfnt_off00013ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED8 13104 bytes
SHA-256: 33d057bc2e40e569437bfebbf874ab443a77313098b5e868664b19ed7f5b991c