Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f755b1b904b3cf5…

MALICIOUS

PDF

79.3 KB Created: 2021-03-01 16:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 779455634f25cb82cebecfd60fd9c71d SHA-1: 9e5743de69638d041a907c35d19f7f4f06bb3242 SHA-256: 8f755b1b904b3cf55ac2d2320ae41fabb8ce275669048e676f1bb41f8ccd9701
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous external URIs pointing to disposable domains and link farms, suggesting it's designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=maths+formula+for+gre PDF link annotation
    • https://cdn.sqhk.co/luwibajik/hjuTTBX/air_hockey_tournament_rules.pdfIn PDF document text
    • http://seplafond.xyz/kofanidasavefujejafo56xw3.pdfIn PDF document text
    • https://cdn.sqhk.co/jizapamilizo/kdgjijc/57490184017.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/30841313619rxnvs.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/V9hijeB/53946955076.pdfIn PDF document text
    • http://tiktokfrance.fun/ouz_atay_tutunamayanlar_indirldjsh.pdfIn PDF document text
    • http://the-job.ru/83496846139lir24.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/KEjfUDm/58291807448.pdfIn PDF document text
    • http://vakojewutoz.22web.org/calories_in_taco_bell_power_bowl_chicken.pdfIn PDF document text
    • http://infonewstravel.com/zaz_animation_pack_8._0ddsb2.pdfIn PDF document text
    • http://tisigetid.iblogger.org/how_much_oil_does_a_2019_vw_tiguan_take.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tiduro/whirlpool_generation_2000_fridge_freezer_manual.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/world_map_with_oceans_and_continents_labeled.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/tasmanian_tiger_reading_answer.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_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 5188 bytes
SHA-256: 16d040751c66ceb565295459bd598ca71839f25717e5e0a5a641bfc36619eedb
font_01_sfnt_off0000ff2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off000107ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BA 12012 bytes
SHA-256: 84a1b14c2a7c1ab79e738ae3b3efcecb893cc36c26c46e1a0bd45b6e99282ce4

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