Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fcb0e5a595a6a6…

MALICIOUS

PDF

76.3 KB Created: 2021-05-07 03:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a10870c3a7d736845f14dfd79c173e86 SHA-1: dcd91c42cfb1365b495480234a9e806e9f13e608 SHA-256: 62fcb0e5a595a6a65e4c540727e4cede9e451f881d0b41b9d3c6e928707dabc7
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://maypoin.ru/strik?utm_term=southwest+ga+insurance+services PDF link annotation
    • http://sumodena.getenjoyment.net/33207887153.pdfIn PDF document text
    • https://cdn.sqhk.co/budijapa/egiMVQh/nametiwoserodujinupofem.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/47009501746.pdfIn PDF document text
    • https://cdn.sqhk.co/radofufalam/jbEmJih/street_racing_hd_app_download.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/8806081419.pdfIn PDF document text
    • http://jugepawe.medianewsonline.com/31456777488.pdfIn PDF document text
    • http://vikiduxa.mywebcommunity.org/81865333975.pdfIn PDF document text
    • https://cdn.sqhk.co/womafafowix/pONdjuj/52976748643.pdfIn PDF document text
    • https://cdn.sqhk.co/numobelez/gjfIhzV/suratasa.pdfIn PDF document text
    • https://cdn.sqhk.co/jobasalem/djiNshg/zovogesu.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/autumn_leaves_bass_sheet_music.pdfIn PDF document text
    • http://vixabaj.scienceontheweb.net/xojus.pdfIn PDF document text
    • https://cdn.sqhk.co/boketumejipa/Egjhhwz/85776975522.pdfIn PDF document text
    • http://fipizilemuwob.medianewsonline.com/vifexetedofozo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_719283df793d439785d8354a1c5177b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sepawi/60820212023.pdfIn PDF document text
    • https://d6477b75-8e4d-4453-8bbc-a86a6009e57c.filesusr.com/ugd/261d41_53f35f93890a41719bc87012eca912d3.pdf?index=trueIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_a13fdde80f7d45d6a0f359bbc7ce0fe3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/fisemejetame.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/buzz_lightyear_game.pdfIn PDF document text
    • https://c38d9960-f3a4-46a0-b266-cfc7836dd0ed.filesusr.com/ugd/a8d9c8_9d0991c96f12467e8dda79e28ac394da.pdf?index=trueIn PDF document text
    • http://wutesejib.onlinewebshop.net/border_design_for_certificate.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/animal_exposure_report_form.pdfIn PDF document text
    • https://467375c7-a7a6-4806-a9b7-892c2a528f89.filesusr.com/ugd/911174_472f345702074a448d816f769e92c9f5.pdf?index=trueIn 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_off0000ebb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 5284 bytes
SHA-256: dbb2faf3ca0ed66276f735d1da2a295856ebf5693cffb028a5c0921b2569f285
font_01_sfnt_off0000fdbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBC 11192 bytes
SHA-256: 467a03c7baceaad568f29f18ddc8e558a59984151f19e7c0f175e896a5963557