Malicious PDF — malware analysis report

Static analysis result for SHA-256 962c025e8150d849…

MALICIOUS

PDF

75.2 KB Created: 2021-03-06 10:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 01b7027e4e8d35e772caebfec9a3f8c7 SHA-1: 82bc02ff61928dfc3613bd1cf276cfa052df3e7e SHA-256: 962c025e8150d849096533d46355982faad763ddd6d045200f79ec3fe52659be
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary external URI pointing to 'https://zajinet.ru/strik?utm_term=what+is+the+best+personal+laser+printer', suggesting a lure to a malicious site. The PDF's structure and numerous links also indicate it functions as a link farm, likely to distribute malware or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=what+is+the+best+personal+laser+printer PDF link annotation
    • https://cdn.sqhk.co/wemowubire/gdrifKv/56468743489.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/xajuzuboxewidubovov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427295/normal_601ca915e9819.pdfIn PDF document text
    • http://zusozovi.22web.org/9759113232.pdfIn PDF document text
    • https://cdn.sqhk.co/bogabixexuja/5jiP3VM/the_best_brain_training_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474988/normal_60109138b6479.pdfIn PDF document text
    • http://jarizodej.22web.org/who_owns_jayco_australia.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/house_on_the_hill_lyrics_lil_skies.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/acentuacion_palabras_agudas_graves_llanas_esdrujulas_sobreesdrujulas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459926/normal_5fcebb2852c1d.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/cabelas_32_meat_grinder_auger.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/kewakuko/ludoka.pdfIn PDF document text
    • http://larisakexifa.epizy.com/palosorumiborom.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_1e95ffb07e294e45bdab135fb8faac9b.pdf?index=trueIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_601128a660dc4b4f9931d0bec1c34d43.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sedowedi/cabal_online_na.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/bang_bang_movie_song_full_hd.pdfIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_c825a79a0fbb4189a0914ac58174fc7e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazomo/jilabidorozavalanadu.pdfIn PDF document text
    • http://wabiraxo.rf.gd/pigopunop.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_off0000eb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0B 5060 bytes
SHA-256: a48ca19c021a54a20d35f24d2811136d9caf15f8f95b8f438ae90088332204d9
font_01_sfnt_off0000fc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC43 10224 bytes
SHA-256: 6c0f9ca0833e574f47bb7ed195c22521f87b51c86eaa3d6639a77481519d2e9c

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