Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ee4b434ba24489…

MALICIOUS

PDF

82.8 KB Created: 2021-04-02 21:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 43bf6650b93e4172e1fa54118bda2b32 SHA-1: f343dcfd0ba70fd0b79af09ccc8778bbc6d80e8b SHA-256: c3ee4b434ba24489ef0be498b8ccbe4c5543e9aa64c33d8dda1743bb8472043f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://golowaki.ru/strik?utm_term=what+is+nowhere+news PDF link annotation
    • http://zugasanuko.getenjoyment.net/hyundai_sonata_embera_maintenance_cost.pdfIn PDF document text
    • http://justamorem.com/174606970991aw02.pdfIn PDF document text
    • https://vevofuxideg.weebly.com/uploads/1/3/1/4/131405958/99b335d2623f151.pdfIn PDF document text
    • http://korixoludofuguk.scienceontheweb.net/english_lesson_plan_d._el._ed.pdfIn PDF document text
    • http://filmera.ru/28432233831w3ccf.pdfIn PDF document text
    • http://farotosinotom.mywebcommunity.org/reducing_carbon_footprint.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5fd7b79736274.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/xiwokon.pdfIn PDF document text
    • http://onlinekartiadesi.com/chithari_therikkunna_kavitha_songbukrs.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/72073233357.pdfIn PDF document text
    • https://dusoveri.weebly.com/uploads/1/3/1/0/131070325/2976082.pdfIn PDF document text
    • http://naturebiolog.space/47030274612yfm3k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478951/normal_601be55f413a2.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/chhattisgarh_census_report_2020.pdfIn PDF document text
    • http://salonvarna.com/kakumufibegepogaxapunhhi9.pdfIn PDF document text
    • https://jometuke.weebly.com/uploads/1/3/0/8/130874139/jopisuzij.pdfIn PDF document text
    • https://jawenovexexadu.weebly.com/uploads/1/3/4/0/134012785/lovenivogakowoxed.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/5599221323.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/kigulekulexixur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://motuvogipe.onlinewebshop.net/asynchronous_and_dc_machines.pdfIn PDF document text
    • http://zuputes.atwebpages.com/22694331273.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/how_to_use_chefs_choice_knife_sharpener_100.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/xusirizewewo.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_off0001082d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 4844 bytes
SHA-256: 277d24cfb0ee6e2496beaac1078e56de5304c048ae773930d8ae70dac063d30f
font_01_sfnt_off000118b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B5 11012 bytes
SHA-256: 4eef28448a431bf2e534e8b28cc6b75a18f2bf55df65f51d339b1936ec48024f

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