Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f61fe391439078…

MALICIOUS

PDF

84.2 KB Created: 2021-03-20 05:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a45a12be8dc8473663bdb01db51ca726 SHA-1: e808a87b15bb91ef148a4957c15af9c206638298 SHA-256: 95f61fe39143907879e37a02c6dc299f26f7c314c7fe5d6f7367da3deabffe78
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file. The document body, though heavily obfuscated, suggests a lure related to statistical distributions to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://jumiwimov.ru/award?keyword=normal+binomial+and+poisson+distribution+pdf
    • https://static.s123-cdn-static.com/uploads/4470826/normal_5fc74fc9ef5b0.pdf
    • https://cdn.sqhk.co/gusisitixinu/heiiYEK/zafibipefifuxopeduledolak.pdf
    • https://cdn-cms.f-static.net/uploads/4388041/normal_60137f1f1906c.pdf
    • https://static.s123-cdn-static.com/uploads/4365638/normal_5ffaa8cd72831.pdf
    • http://myfirstsite.xyz/bahubali_full_movie_telugu_mp428tkq.pdf
    • http://salonhq.xyz/feeding_guidelines_for_3_month_oldby8c1.pdf
    • https://static.s123-cdn-static.com/uploads/4418579/normal_5fffb0f00ce64.pdf
    • http://max-lifting.store/cambridge_checkpoint_maths_textbook_2aegke.pdf
    • https://cdn-cms.f-static.net/uploads/4478683/normal_6036dce5a0a62.pdf
    • https://cdn-cms.f-static.net/uploads/4411709/normal_60310247d94d9.pdf
    • https://cdn-cms.f-static.net/uploads/4529024/normal_603e884a1ca2b.pdf
    • http://rameautbxy.space/therapeutic_foster_care_aztgrmd.pdf
    • https://cdn.sqhk.co/nowovadizeb/6YY7Ky5/xepuzavolaxuja.pdf
    • http://iglivesupportteam.com/dunkin_donuts_new_breakfast_bowls_nutrition_informationaowh3.pdf
    • https://cdn.sqhk.co/pipujevi/eSo4Bhj/mekuwumo.pdf
    • https://static.s123-cdn-static.com/uploads/4464053/normal_5ff423c14a20c.pdf
    • http://healthytrands.com/default_password_for_xerox_workcentre_32153owcd.pdf
    • https://cdn.sqhk.co/miweguzeg/eN9ygep/savings_tracker_coloring_pages.pdf
    • http://videohost.space/23376312828fe8gh.pdf
    • http://makedctl.site/progressive_dynamics_power_converter_wiring_diagramm386c.pdf
    • https://cdn-cms.f-static.net/uploads/4368732/normal_6018843dea1fd.pdf
    • https://static.s123-cdn-static.com/uploads/4486034/normal_5ff9f8987e359.pdf
    • https://cdn.sqhk.co/dojarodawiw/jdsxdrZ/4630005961.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_3382589b944b444a8c24dd5e668b3751.pdf?index=true
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_a99c7bafebf24577946bcbcbd0f0f623.pdf?index=true
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_e0fb0ab260e54da5bd010137300360ac.pdf?index=true
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_18e0ec973fab439eab4c259eef2caa78.pdf?index=true
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_596bab9daf204d97971ac22552acae76.pdf?index=true
    • 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_off000107ea.bin
6d88d8dc291607eb7dcfbc66ecd1f417f24320ec7620bb626d80f34479c1c4d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107EA 5296 bytes
font_01_sfnt_off000119cd.bin
4188e9012b39bae5ca3b6cb45d6cd6efeb00290d1f5c977e0aa83aebb25fc64a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119CD 11888 bytes

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