Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9e7905de8e232a…

MALICIOUS

PDF

82.6 KB Created: 2021-04-07 05:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d96c9d9fd906354289c204418fd22ac6 SHA-1: 458a779096b22052b999e39e230f13f86790f7ec SHA-256: 9b9e7905de8e232a5cedb066ac1385ebb4a6db11c1de8b016c21e20f7ed014df
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL, https://ponafet.ru/wix?keyword=warn+20990+premium+manual+hubs, being a likely C2 or phishing endpoint. The document body, though heavily obfuscated, suggests a lure related to manuals or reports, consistent with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=warn+20990+premium+manual+hubs PDF link annotation
    • https://forilulan.weebly.com/uploads/1/3/1/4/131408022/7513654.pdfIn PDF document text
    • https://cdn.sqhk.co/zoburawava/ib1Osgf/doctor_who_treats_ear_is_called.pdfIn PDF document text
    • https://libufuvebugun.weebly.com/uploads/1/3/1/4/131406816/kevupinitej.pdfIn PDF document text
    • https://wudavatu.weebly.com/uploads/1/3/4/4/134457778/49e3cf1171cd912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_5fd32d8b051c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503584/normal_6033d7ae03abb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_602753ea73fb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_601c0462b3b27.pdfIn PDF document text
    • https://cdn.sqhk.co/muwanije/j0gdLid/gladiator_vr_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444115/normal_601fab4ede6c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/50297426553.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/el_cuadrado_bruno_munari.pdfIn PDF document text
    • http://dumudolaba.epizy.com/tag_carrera_calibre_16_manual.pdfIn PDF document text
    • http://bewalixatama.epizy.com/grenfell_report_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93c19f27-6b5b-4f6e-a953-128deab15f1a/37094599601.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/25739892705.pdfIn PDF document text
    • http://zokugapifixi.rf.gd/gixixabomokuwalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c31dc7-2ec7-44f8-a11f-01a9b9f22cba/differential_association_reinforcement_theory_definition.pdfIn PDF document text
    • http://gedenisik.rf.gd/iskcon_bhagavad_gita_in_english.pdfIn PDF document text
    • http://dosatetirudipu.epizy.com/carnatic_songs_ringtones_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/sisevisazapopamowo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49A 5336 bytes
SHA-256: 7f86ade22e14c8c83b2e8298d614ff7761bf75a1906e054dbc36395e989a441c
font_01_sfnt_off00010674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10674 11964 bytes
SHA-256: f6ce6863ab08da0f9a12e0759cdf24e66d16c595d684fa1612ecd8e1bc447e44
font_02_sfnt_off00012edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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