Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a0befd0d2704d5…

MALICIOUS

PDF

69.8 KB Created: 2021-03-20 19:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 98e36324cf11e581b4105d19a21b2c62 SHA-1: 887fc6e5a25f2f72cccd0113a53966e11539dd70 SHA-256: c0a0befd0d2704d5c64d30a61f1656bc24b98c83ef10f4b8154e65b33e4246d1
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many of which point to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/award?keyword=anemia+ferropenica+en+ni%25C3%25B1os+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446015/normal_5ff4490fbdf47.pdfIn PDF document text
    • http://generatorsale.ru/best_sniper_movies_on_netflixo3bb3.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/ggcY3jg/wizukila.pdfIn PDF document text
    • http://bloomwithdeanna.com/monkey_types_for_petscyn0s.pdfIn PDF document text
    • https://wexasubofuxumeb.weebly.com/uploads/1/3/2/7/132740188/561233.pdfIn PDF document text
    • http://useporte.xyz/kangaroo_reproductive_systemz5tqk.pdfIn PDF document text
    • https://pemolopudamas.weebly.com/uploads/1/3/4/7/134753943/xupif-zibulutapajuk-lutake.pdfIn PDF document text
    • http://sreda.city/conflict_resolution_skills_workbookzpopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409103/normal_5fdaec1fd218f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_601763b41acf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_6019a0948acf9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490364/normal_60014f716aefc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427504/normal_5feb5a27e2957.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/pgfidjj/modern_sofa_table_decor.pdfIn PDF document text
    • https://morogixifidogaj.weebly.com/uploads/1/3/4/4/134497599/bewemogivodet_wisevewegabam.pdfIn PDF document text
    • https://fenanenu.weebly.com/uploads/1/3/4/2/134265689/5023375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447885/normal_604e3e15cb313.pdfIn PDF document text
    • https://dijamolilum.weebly.com/uploads/1/3/5/3/135347404/mawusagine_tusobumabane_fufizokaz_bulab.pdfIn PDF document text
    • http://bitcoinchat.fun/87597262272boolg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529281/normal_602f26f3bade4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528780/normal_5ffc48a4a4400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_601bc101aef78.pdfIn PDF document text
    • https://cdn.sqhk.co/gogerazina/J2hkFgc/61926450362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_60235266aafb0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD002 5468 bytes
SHA-256: 74646f7d5eef79ff6b259a57050ba633b97d2255afbc5fb5589a1a0388067548
font_01_sfnt_off0000e247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE247 11684 bytes
SHA-256: 0a03d7817c9b5081086c23f4e2a06c6d1694731903fe67b04c44fe06307393a4

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