Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b64f1b5b29e990…

MALICIOUS

PDF

95.4 KB Created: 2021-02-25 23:17:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 82662e9fef556488262d91aa7ec8b519 SHA-1: b6b3c221f16177d736be4cc00d403b33f0617074 SHA-256: 85b64f1b5b29e9907ab11fc66130fe17ce9ae2f1f1d0d6e68bbe8fd51b96536a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'Adobe Premiere Pro CC 2018 free trial download', suggesting a phishing or scam lure. The presence of numerous external URIs, many pointing to disposable hosting and link farms, further supports a malicious campaign aimed at redirecting users to potentially harmful content or downloads. The heuristic 'SE_SECURITY_BYPASS' suggests the document may also attempt to trick users into disabling security measures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://bologen.ru/strik?utm_term=adobe+premiere+pro+cc+2018+free+trial+download PDF link annotation
    • http://futup.ru/a_pair_of_tickets_short_storyiwuh3.pdfIn PDF document text
    • http://trells.space/food_cost_analysis_excel_templateoiiiv.pdfIn PDF document text
    • https://zivuxava.weebly.com/uploads/1/3/5/9/135991205/joxixeximekikem.pdfIn PDF document text
    • http://mastericy-chistoty.ru/characteristics_of_living_things_worksheet_answer_keyxvrqq.pdfIn PDF document text
    • http://hook-up.fun/xbox_one_live_gold_codes_not_usediqi86.pdfIn PDF document text
    • http://lnstagramverifycentre.com/mrs_funny_bones_free_download3dxmr.pdfIn PDF document text
    • http://delinapod.mypressonline.com/steps_on_starting_your_own_business.pdfIn PDF document text
    • http://mosquito.codes/84070779835ixnh1.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/cub_cadet_lt1050_deck_belt_keeps_coming_off.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/KhhhbcP/nickelodeon_resort_nj.pdfIn PDF document text
    • http://betmoy57.com/fun_english_exercises_for_beginners6w2uf.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/eRCzqzY/7302114828.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/Kijbihx/37969637276.pdfIn PDF document text
    • https://cdn.sqhk.co/zibusisujij/Ygf3RTc/polovivinodogumabuma.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/vezumobigodub/8027926339.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/campbell_hausfeld_pressure_washer_1800_psi_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/gokekez.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 18236 bytes
SHA-256: 7506f2445ee28d25edbb9485a32ce919a422ca796d9d4979c56cdec56d236404
font_01_sfnt_off000127fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FD 5652 bytes
SHA-256: e209b287e30d7638185829d626d2ec1d91bea69dd0824421db614a1361affc8f
font_02_sfnt_off00013b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B27 10608 bytes
SHA-256: cd0c651c1a82aa719c743a0677c83b23d552d4877bb43f204e721f38e8ded121
font_03_sfnt_off00015f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F94 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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