Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf966879542a4b7e…

MALICIOUS

PDF

88.0 KB Created: 2021-03-22 22:25:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77a3ed2ded2524759e6ca102da0a1acd SHA-1: d7f0bed97f72a0beef88ebc25f0821f0d8fb2dbb SHA-256: bf966879542a4b7edfc9d4de88ffd59790d394484c64aca02a68dfdd3b060b7b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'bologen.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=secret+life+of+bees+quotes+chapter+6
    • https://static.s123-cdn-static.com/uploads/4455377/normal_6004695aa104c.pdf
    • https://cdn-cms.f-static.net/uploads/4446759/normal_603fe256c1ef8.pdf
    • https://cdn-cms.f-static.net/uploads/4403676/normal_602f570e86d21.pdf
    • https://cdn-cms.f-static.net/uploads/4491432/normal_605078180a14c.pdf
    • https://static.s123-cdn-static.com/uploads/4418788/normal_5ffbe0d097aa2.pdf
    • https://cdn-cms.f-static.net/uploads/4485587/normal_602b4c96478d6.pdf
    • https://cdn-cms.f-static.net/uploads/4404112/normal_5fd27df2d9a01.pdf
    • https://cdn-cms.f-static.net/uploads/4482636/normal_6054418bac81f.pdf
    • https://cdn-cms.f-static.net/uploads/4421624/normal_5fd7a94110468.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/salosibejodod/symantec_dlp_14._6_maintenance_guide.pdf
    • https://s3.amazonaws.com/pirosisob/temivupu.pdf
    • https://s3.amazonaws.com/badodemebo/keroxapaguz.pdf
    • https://s3.amazonaws.com/janodojivi/lojuveta.pdf
    • https://s3.amazonaws.com/kibavutibeved/chemical_equilibrium_class_11.pdf
    • https://uploads.strikinglycdn.com/files/cd9fab18-6bac-4cfc-bd16-73a838d08ff6/precalculus_textbook_sullivan_7th_edition_online.pdf
    • https://uploads.strikinglycdn.com/files/0361da46-771a-498d-bb7a-cb9df5a54435/best_doro_smartphone_for_seniors.pdf
    • https://s3.amazonaws.com/dazifozixawus/b2b_payment_system.pdf
    • https://uploads.strikinglycdn.com/files/6c1a76a2-cd78-4312-8e00-fa4155298e36/community_service_requirements_for_delta_sigma_theta.pdf
    • https://uploads.strikinglycdn.com/files/9616ae5d-df5f-4f46-b67d-52b54f380231/que_significa_soar_caminar_sobre_agua_limpia.pdf
    • https://s3.amazonaws.com/legipalofi/13599145329.pdf
    • https://s3.amazonaws.com/kotenu/motorola_sb6141_maximum_speed.pdf
    • https://s3.amazonaws.com/jenisozazewubo/kill_team_movie_true_story.pdf
    • https://s3.amazonaws.com/doxifuba/developer_portfolio_template_wordpress.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d3d.bin
2757084dac497dc3af648d46fb4d8603ba1d77c245268bc99d79d4d2912df311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3D 5400 bytes
font_01_sfnt_off00011fae.bin
32ed946a37f79e38a0aed121deaf1ff41c5de34616f476e5d883d7bbda880baa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAE 10676 bytes
font_02_sfnt_off000143f4.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143F4 4324 bytes

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