Malicious PDF — malware analysis report

Static analysis result for SHA-256 4067e66e44781755…

MALICIOUS

PDF

83.2 KB Created: 2021-05-22 20:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c24693cde1d9345daa23dcc339c47be9 SHA-1: 3cf1f707f7f96ea693111128eca3ca3dd0c7f059 SHA-256: 4067e66e44781755a6a3c08e7d65ea84f174a1e83bb75a2554f398f594438d7d
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, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity, likely aiming to redirect users to potentially harmful sites.

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://dugedepap.ru/strik?utm_term=are+gore+tex+boots+really+waterproof PDF link annotation
    • https://lepoboniw.weebly.com/uploads/1/3/0/9/130969744/7446463.pdfIn PDF document text
    • https://xuzuvakewose.weebly.com/uploads/1/3/1/6/131637797/juvademujabomof-dabin.pdfIn PDF document text
    • https://lavolobaned.weebly.com/uploads/1/3/0/7/130740571/mitatofeda-sopemexid.pdfIn PDF document text
    • https://wijuluberaselak.weebly.com/uploads/1/3/4/0/134016921/4643938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386089/normal_6059f615067bd.pdfIn PDF document text
    • https://famoresarit.weebly.com/uploads/1/3/4/6/134680052/a7cf7eb3606.pdfIn PDF document text
    • https://kerozuvesiduzam.weebly.com/uploads/1/3/4/3/134375161/2272181.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403531/normal_5ff966543339d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477408/normal_605a2f0c30270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410191/normal_60542d431e31a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459463/normal_5fde66daacfc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459182/normal_60172af3239df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486221/normal_5ff866be488c7.pdfIn PDF document text
    • https://kojovade.weebly.com/uploads/1/3/4/6/134681743/movawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491414/normal_6032b71611090.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/b5474fb6-042c-4a83-878d-265a53f5eaa7/what_size_is_1_inch_in_cm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f21521-e76a-4fb0-9e01-7a2a03b609f0/24763420967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c797c2-893e-4751-bd4c-210840d1e507/jemosiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ca85f3-8533-4193-bedf-dbb94dacdf3c/how_to_start_preparing_for_gmat_quant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65c82208-56ad-486c-a82c-8e53e0cc0757/99609369646.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD34 5460 bytes
SHA-256: 01a9ebe4ead3fcd93ed1cd3d222090ac3a280611b657a4bae1f4ad71717440ca
font_01_sfnt_off00010ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF0 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0001187e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187E 11156 bytes
SHA-256: 483b4545a5f005034880ed6d0d4c39ca6874d380ac295bfceca8e70228623df6