Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c7301acaa4762d…

MALICIOUS

PDF

79.6 KB Created: 2021-06-14 16:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c3448b826d37d7a6aeaea844caae6d08 SHA-1: e12d609e33174aaf458560550874602770a9564c SHA-256: 01c7301acaa4762d35bd48208f01cee81d700c5ffa7780533faca211a28607c4
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/123?utm_term=ignou+assignment+submission+front+page+pdf PDF link annotation
    • https://jabudebixeref.weebly.com/uploads/1/3/4/3/134398441/9bc774bdb3dce.pdfIn PDF document text
    • https://nitagupivef.weebly.com/uploads/1/3/4/3/134342099/jarebubufamo.pdfIn PDF document text
    • https://zefuriduzowav.weebly.com/uploads/1/3/0/7/130740504/2672025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465543/normal_601165d622b65.pdfIn PDF document text
    • https://kogimejazasopuj.weebly.com/uploads/1/3/4/7/134713999/bakovan.pdfIn PDF document text
    • https://binewetakug.weebly.com/uploads/1/3/5/3/135326509/42d0819490e9.pdfIn PDF document text
    • https://fililajivivumir.weebly.com/uploads/1/3/4/4/134456316/56b72.pdfIn PDF document text
    • https://pokaruda.weebly.com/uploads/1/3/7/5/137509536/2953158.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371272/normal_5ffe0d11c17d0.pdfIn PDF document text
    • https://fabedajigunud.weebly.com/uploads/1/3/4/4/134480588/694ea22a.pdfIn PDF document text
    • https://tizezesi.weebly.com/uploads/1/3/4/0/134041120/7491846.pdfIn PDF document text
    • https://rukazoxet.weebly.com/uploads/1/3/4/0/134040508/cca82e4f99.pdfIn PDF document text
    • https://nadebexipopajin.weebly.com/uploads/1/3/4/6/134678264/xakarepamobamefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_6050ec40e2637.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/16bdd2bb-0fd0-4d7e-9724-fc97d32bd631/firomegafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15540466-8f2e-4255-addb-f49defc2932d/sat_math_formulas_to_know.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a0d8c6-774a-4e9b-a6ce-4f013b05e859/half_orc_guide_pathfinder.pdfIn PDF document text
    • http://mawasuwov.pbworks.com/f/famajozo.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/w/file/fetch/144488793/zeterokarafubalu.pdfIn PDF document text
    • http://zosajivapesi.pbworks.com/w/file/fetch/145202187/pofikirikew.pdfIn PDF document text
    • http://dimutojopog.pbworks.com/w/file/fetch/144444396/when_can_we_listen_to_lalitha_sahasranamam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44a5452-8a6c-4d99-a672-3f3bd0dff1f8/apus_file_manager_pro_mod_apk.pdfIn PDF document text
    • http://gufabewa.pbworks.com/w/file/fetch/144754206/xeremofaxajoruwo.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_off0000f915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF915 5404 bytes
SHA-256: 0f707c726d28d015d7646261e487063c858fa5e443a521b82637d917b878b8b6
font_01_sfnt_off00010b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 11028 bytes
SHA-256: 3ff965ada4c01bc581812d1fee74a693dcd4a5592ab6d5208fca02506dd41e1c