Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d05bb44fb2f753…

MALICIOUS

PDF

85.6 KB Created: 2021-04-02 14:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96c2b2c6332fcc947740b1f4948f863a SHA-1: b4fe607d2c302aa1a08b48dcd963dcf9542e8a33 SHA-256: a8d05bb44fb2f75360b6fd06aea5e2e44aa9b68977bfed001b1508739013ec51
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded links, with a significant portion pointing to disposable domains and potentially malicious hosting. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host phishing content. The presence of external URIs suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=can+you+put+avon+skin+so+soft+on+your+face
    • https://namatevugaveri.weebly.com/uploads/1/3/4/3/134350782/jivirezep.pdf
    • http://effektzhizni.ru/graco_duetconnect_lx_multi-direction_baby_swing_and_bouncer_-_asher_parts6mux6.pdf
    • http://ruszaimclub.ru/185481343132uf0e.pdf
    • http://mekapetakosa.22web.org/zumodifuxojiwabugage.pdf
    • http://fresh-ita.fun/motorola_g6_plus_wireless_chargingr8v1p.pdf
    • https://nonafinawajag.weebly.com/uploads/1/3/4/3/134331790/punijuxuf.pdf
    • https://cdn-cms.f-static.net/uploads/4367000/normal_604bac39d05ee.pdf
    • http://laulu-go.ru/air_control_valvein9s6.pdf
    • http://worldworkbook.com/92002090165krcd4.pdf
    • https://cdn-cms.f-static.net/uploads/4413973/normal_6023b80dd2207.pdf
    • https://wojewifonutej.weebly.com/uploads/1/3/4/8/134883442/tizomivuvujulumej.pdf
    • https://static.s123-cdn-static.com/uploads/4473616/normal_5ff78f6393f33.pdf
    • https://cdn-cms.f-static.net/uploads/4495265/normal_6065796d10d6d.pdf
    • https://kigivalivago.weebly.com/uploads/1/3/4/3/134337689/3182.pdf
    • https://budovabi.weebly.com/uploads/1/3/4/5/134510119/fc2f28501e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vuforewebub/how_to_drain_water_from_delonghi_air_conditioner.pdf
    • https://s3.amazonaws.com/vebenok/partituras_boleros_guitarra.pdf
    • http://wofogadopa.rf.gd/azur_lane_formidable_build.pdf
    • http://xorunak.epizy.com/adobe_premiere_6.0_free_download_mac.pdf
    • http://zubumedi.rf.gd/automobile_spare_parts_shop_project_report.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ff6.bin
26abb67d42d3eab8d88dbd38444fa7369cfa1142da7a5be1c96e20e6885c6a74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF6 5108 bytes
font_01_sfnt_off0001217d.bin
ec408f7ab17f49d5f2b977e15eb0ce9ff5b1a8b114e979b915d40e1dd969220d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1217D 11684 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.