Malicious PDF — malware analysis report

Static analysis result for SHA-256 693f48d1e09ff223…

MALICIOUS

PDF

77.0 KB Created: 2021-05-28 20:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5053217bbb86f732ae6a70413ac2f28c SHA-1: 5369b92e0d522f48aeb3a9d4e9c8f8c136538e57 SHA-256: 693f48d1e09ff2233ebbd928d2720d96fcaa799e0e599035c48c3d7241d09778
186 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 0.9991

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://golowaki.ru/strik?utm_term=make+way+for+dyamonde+daniel+character+traits PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477649/normal_5fec04f4baadf.pdfIn PDF document text
    • https://tunutepefa.weebly.com/uploads/1/3/1/4/131453603/c6ac81c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465012/normal_6017df39e105f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_600d87e282091.pdfIn PDF document text
    • https://nodajalij.weebly.com/uploads/1/3/5/9/135990600/dujoj.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4472200/normal_60aff8662eaeb.pdfIn PDF document text
    • https://gatevipamor.weebly.com/uploads/1/3/4/8/134878843/1779098.pdfIn PDF document text
    • https://runonidalebemi.weebly.com/uploads/1/3/2/6/132682230/8762305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462341/normal_6060966e08ee4.pdfIn PDF document text
    • https://sawobefuridavo.weebly.com/uploads/1/3/4/8/134895752/cb43f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_5fe74fdb7a3f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408340/normal_5fd30bd7bf57c.pdfIn PDF document text
    • https://sutowuvo.weebly.com/uploads/1/3/4/6/134685384/valudajogu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5fefaa7953a19.pdfIn PDF document text
    • https://fofapabijutoza.weebly.com/uploads/1/3/4/7/134713913/2657159.pdfIn PDF document text
    • https://kifeketefisub.weebly.com/uploads/1/3/5/3/135347095/gapilezufaviled.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451212/normal_5fd904163f94e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_60468c1bb4097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422622/normal_606aa5f03d85d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466165/normal_5ff06b554a145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374698/normal_600f014458f8d.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/0e665020-3dbd-4b1c-8976-4c6b82398ec6/74781825282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d374db-b181-4d00-910e-8992dc0457c2/how_to_adjust_height_on_a_teeter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e991a231-694a-47cc-82d0-7278d8b0db7d/89226330614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8df5d13-6fb5-4cea-8792-d9fba70cfd38/gp_medium_army_tent_setup.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_off0000ecd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD1 5524 bytes
SHA-256: 8a2b0d72af0467e65e0858f83ef2fccbc08ba5ac4a797c771efeffd434b54ef1
font_01_sfnt_off0000ff9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9A 11312 bytes
SHA-256: 69986ace6634825a0d3c411cbe1bd9126594b37dd80060a9d14fbc8961204541