Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e1a132adee2032…

MALICIOUS

PDF

85.0 KB Created: 2021-03-23 00:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 559cd335a7a45d2672951b29c61a28bf SHA-1: b7fc9caa85bc10c85cc525cca44abf310475975f SHA-256: 34e1a132adee2032252e9578153702fb4793fc86777cb799e5c9a931f5f6e9a1
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains text related to job opportunities, likely a lure to encourage users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://nipisod.ru/strik?utm_term=what+jobs+can+you+get+with+a+degree+in+educational+psychology PDF link annotation
    • http://it50life.pro/which_roomba_is_best_for_tile_floors2h14q.pdfIn PDF document text
    • https://pufujodixig.weebly.com/uploads/1/3/1/4/131438007/fedudajuw.pdfIn PDF document text
    • https://cdn.sqhk.co/vozupowo/bUjf7ja/buzzer_sounds_online.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/gbicWKd/allegiant_phone_number_always_busy.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/g1VvZod/68933914950.pdfIn PDF document text
    • https://luzijegeze.weebly.com/uploads/1/3/4/0/134040843/7938c4b870.pdfIn PDF document text
    • https://fezuwarojeti.weebly.com/uploads/1/3/1/3/131383544/zevunesuw-tekagofoxikuf-galumesiviluget.pdfIn PDF document text
    • https://xiwabedosebu.weebly.com/uploads/1/3/1/3/131398066/vuwed.pdfIn PDF document text
    • http://magic-spring.com/1444494455818i43.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/yWgeahb/radio_flyer_movie_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/xotakuzazuf/fQibQgj/free_illinois_residential_lease_agreement_template.pdfIn PDF document text
    • https://ludikunoxor.weebly.com/uploads/1/3/5/3/135345671/tewapalawita_nikiguvizipubi.pdfIn PDF document text
    • http://differencecheats.net/zokakifowapryeh.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/zobuwubedak/mandino_greatest_salesman_in_the_world.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/mitsubishi_73_inch_tv_dimensions.pdfIn PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_1ee69be883514e06a86f3d77726a2e2e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/ejemplos_de_minutas_de_juntas_de_trabajo.pdfIn PDF document text
    • https://21d44941-995c-48b9-956b-8145330e20d5.filesusr.com/ugd/577b75_a77a5318057e46d9ae1f03e75f00b481.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/amadeus_operational_flight_information.pdfIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_ca275d486dca47b681d468cfe0132b94.pdf?index=trueIn 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_off00010b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3B 5756 bytes
SHA-256: a14781007311cf737b8c0d54d059f1310364a0dba747c2d7b16cc64bb6e27b9a
font_01_sfnt_off00011eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEC 10836 bytes
SHA-256: 8c4d70a6f5c1b80c939d864a5f52a17047687584383363935f163b30022f3035