Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47a14caa92a1f14…

MALICIOUS

PDF

75.9 KB Created: 2021-05-17 19:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4c960761648e814468da433caea34f93 SHA-1: 5cd0eec1e38d3e279f4dde33e8cff675bd96f643 SHA-256: f47a14caa92a1f14f9e3acb132eb546f899a2677607ce65eae7eba4017014b53
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 0.9998

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://xezojetit.ru/strik?utm_term=what+is+field+duty+in+the+army PDF link annotation
    • http://sevezor.scienceontheweb.net/11748983750.pdfIn PDF document text
    • https://wojamoze.weebly.com/uploads/1/3/4/4/134479738/dekanabujibel.pdfIn PDF document text
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/1931821.pdfIn PDF document text
    • https://cdn.sqhk.co/naxiwakiwuv/Dxibl0O/spiral_notebook_clipart.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/jenuxaferiduxunojaxaripat.pdfIn PDF document text
    • http://energytik.net/38037167262hotzu.pdfIn PDF document text
    • http://mosuzovopij.22web.org/loxafixib.pdfIn PDF document text
    • https://cdn.sqhk.co/tazakabebilo/JRhdgfa/planet_fitness_membership_cost_a_month.pdfIn PDF document text
    • http://petrol-v-pol-price.site/werututewazalemb4ym3.pdfIn PDF document text
    • https://lorajezaked.weebly.com/uploads/1/3/4/3/134367433/soxid_bupolixutafok_simozunex.pdfIn PDF document text
    • http://baltika-trans.ru/plural_of_nouns_exercises_islbtgy5.pdfIn PDF document text
    • https://vebiponexuxewi.weebly.com/uploads/1/3/4/7/134758887/saferejudegosor-vurewe-dalivi.pdfIn PDF document text
    • https://fojomifurinu.weebly.com/uploads/1/3/1/3/131378835/tuwowiwukenujab.pdfIn PDF document text
    • https://vumizopefi.weebly.com/uploads/1/3/5/3/135313358/c31ad58d9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajulugebimisu.myartsonline.com/whats_the_most_unforgivable_sin.pdfIn PDF document text
    • http://fikapitisox.rf.gd/69370550584.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_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 5260 bytes
SHA-256: 63c973f3a159b784b7fee6ec17eb175e4e60cf45bf67a309a430326414d1c2a5
font_01_sfnt_off0000fff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF3 10244 bytes
SHA-256: 30e666d3974c64a3d24bd426a6a6ccce5e4d6c6afcbbe7e7c35e9a0ab04d21e0