Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b02a770c31eb23…

MALICIOUS

PDF

72.0 KB Created: 2021-03-18 08:06:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7f7f88709501681e8ecce41002d925c4 SHA-1: 2f4472e776e2843c4e82c1e481322a677c207785 SHA-256: f6b02a770c31eb23646fa5e74dd9f2a5ca8012377363a3c9659cb6e4b2ddea6d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically 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 related to search results for a product, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=whirlpool+duet+washer+leaking+clean+cycle PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471085/normal_5fdecee477af1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409827/normal_5fcdd1c844871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_6028f8268f9e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371495/normal_5fe5ef105971d.pdfIn PDF document text
    • http://mnatural.space/how_to_get_my_act_workkeys_scores4u53b.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/cognitive_behavioral_therapy_techniques_for_insomniaunso7.pdfIn PDF document text
    • http://obuv-kozha.ru/frases_del_libro_el_principe_de_maquiaveloy5p24.pdfIn PDF document text
    • http://hookup157.fun/iso_45001_exam_questions_and_answersx6q20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387037/normal_5feccca29659a.pdfIn PDF document text
    • https://cdn.sqhk.co/fenozidu/khegchg/10666994882.pdfIn PDF document text
    • http://electorat.org/futawiipamj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496812/normal_60528220b72f7.pdfIn PDF document text
    • http://crysety.xyz/37761323061ywl45.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/foWh30W/9184240968.pdfIn PDF document text
    • http://lazadacostumercenter.com/hc_lp_trnh_scratchccea6.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/COjcicv/fivepanida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486743/normal_5fe8e83013d96.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/jovekus/47667921082.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/xifofina.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/badger_5_garbage_disposal_lowest_price.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/directions_for_the_closest_walmart.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_off0000cf49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF49 5488 bytes
SHA-256: a1363024c4dd0952ab2bcf1c042854bb9e5f08a608c11d0de0db7a867227bb2c
font_01_sfnt_off0000e203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE203 10076 bytes
SHA-256: 19e10bd30b654f9aaf97ad821b4015d797d7c08502e1a34d8148cfc9b533d2bc
font_02_sfnt_off0001046f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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