Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed874ece3be874a…

MALICIOUS

PDF

90.4 KB Created: 2021-04-01 20:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a6853963da2dbff9a1b419fb32a25974 SHA-1: a93d2264eac47091cb45a836ecd1b52ff226b197 SHA-256: 2ed874ece3be874adb8a33f82b690f4e76cfc7620ccf90eaa226bb8b2965edfc
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating a link farm and embeds external URIs, with one prominent URL suggesting a lure for educational content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/123?utm_term=go+math+grade+1+answer+key PDF link annotation
    • https://cdn.sqhk.co/jigavozef/aiijfhh/webtoon_tower_of_god.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417312/normal_5ff8f025e12b6.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/ijccRIW/gedodagetuled.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_60406a543e7c9.pdfIn PDF document text
    • https://cdn.sqhk.co/mewovegid/c3jeic0/38557925223.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469355/normal_5fcf01f4d6b63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_5fe73f8c7eaed.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/hfDjajj/homo_evolution_human_origins_all_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/6jyfic1/harvest_market_menu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_d12bd38356604751a138ae5ea52cd2a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/vewulonabenenujab.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/transition_words_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/mockingjay_part_3.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/does_iceberg_lettuce_have_calories.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/the_other_side_of_the_mountain_1975.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/avengers_wallpaper_4k.pdfIn PDF document text
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_6322196ae11b42698e152a89651bda4e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/pre_dispatch_inspection_report_format.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/26958680210.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/scrabble_score_if_use_all_letters.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/autodesk_inventor_2019_3d_printing.pdfIn PDF document text
    • https://4a7d9d2b-1d67-446c-8d6d-bdd3043d1f60.filesusr.com/ugd/c3d078_df8f4155e4bb4559a46605f6e743d2bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefunupu/what_is_the_passing_score_for_cpc_exam.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12087 5548 bytes
SHA-256: 44bf624233b48c2908080d2f84707b98fdabc7e61b207478d54b92b2de3bc59f
font_01_sfnt_off00013351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13351 12408 bytes
SHA-256: 96350b969b23f24ae8b4b8464529120eee2c238a75c6c3a96618a716844bf9c4

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