Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4d1169fc0398ca…

MALICIOUS

PDF

76.4 KB Created: 2021-02-23 17:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9ab14d7cc21ee7912e92e3e03b4af965 SHA-1: 372036363ed9ceb85795a8c1b3bc554b36c09a42 SHA-256: 2b4d1169fc0398ca7e721d0539859fcbd37b3e124f37b3cccf5a8c1b967f8e3d
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to malicious content or phishing pages.

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://seumenha.ru/wix?keyword=eaton+chspt2ultra+lowes PDF link annotation
    • https://nasaperexi.weebly.com/uploads/1/3/5/3/135351481/lonegaduf.pdfIn PDF document text
    • https://wupupuredizuso.weebly.com/uploads/1/3/4/8/134894828/3959330.pdfIn PDF document text
    • https://tabawowap.weebly.com/uploads/1/3/4/5/134599755/f3d7041d709ef35.pdfIn PDF document text
    • https://zopupafi.weebly.com/uploads/1/3/1/4/131454349/7e4f3872cc.pdfIn PDF document text
    • https://wowererifawop.weebly.com/uploads/1/3/1/3/131384429/pabexubelinoni.pdfIn PDF document text
    • https://ramageputa.weebly.com/uploads/1/3/1/6/131637054/1079878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_5fe6c763182cb.pdfIn PDF document text
    • https://kewisivi.weebly.com/uploads/1/3/2/6/132681156/7570812.pdfIn PDF document text
    • https://nikakakuko.weebly.com/uploads/1/3/1/8/131871571/9382578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377925/normal_601a4d627d19f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445745/normal_5fffb86379623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5fda57fc011af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_6005736faeea1.pdfIn PDF document text
    • https://pigixona.weebly.com/uploads/1/3/5/9/135986477/3902334.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/mojivikapeti/givalesovavalofimu.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_off0000efc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC4 5200 bytes
SHA-256: d1f0fffee228a02b07f9ac2500d7242b8b07cce857edf1ddce445a60106a620f
font_01_sfnt_off00010185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 10340 bytes
SHA-256: 161a8551ffaaa11976f6860a31e7f66d3328a14cce9bec7105912f8a0e36a4f1

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