Malicious PDF — malware analysis report

Static analysis result for SHA-256 520f6a603aa276a8…

MALICIOUS

PDF

80.6 KB Created: 2021-04-28 09:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1c2d4b99ac18b171819a0bc598873311 SHA-1: 586477959d9594167349dfe5059f730aee847c3c SHA-256: 520f6a603aa276a8ec52561ca1285ff0e0938fa0007d6842d6ab753550b9770c
146 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external URIs, many pointing to disposable domains, and exhibits characteristics of a link farm. The heuristic 'SE_CALLBACK_LURE' suggests a callback phishing or tech-support scam pattern, aiming to trick users into calling a fraudulent number. The presence of embedded URLs indicates an attempt to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mezovuduw.ru/strik?utm_term=walmart+photo+print+promo+code+2019 PDF link annotation
    • https://pepigapipewoma.weebly.com/uploads/1/3/4/0/134000130/leraza-vuvaviwijoz-vuxipaf.pdfIn PDF document text
    • https://pagajunudew.weebly.com/uploads/1/3/5/9/135992687/75e14908c2.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/OyfhBge/colorfly_dark_skull_coloring_book.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/TmigZIp/unnatural_selection_lyrics_meaning.pdfIn PDF document text
    • http://spacexfoundation.net/personajes_de_la_obra_edipo_rey_y_sus_caracteristicas42gv4.pdfIn PDF document text
    • https://rizidapovo.weebly.com/uploads/1/3/4/3/134316848/figexixidaso.pdfIn PDF document text
    • http://saxefitipar.iblogger.org/47043268038.pdfIn PDF document text
    • http://mixed-rootwork.com/31957750089ffutc.pdfIn PDF document text
    • http://batmbatm.ru/how_to_do_exponents_on_ti-84_plus_silver_editionkm47s.pdfIn PDF document text
    • http://hookup154.online/basic_physics_of_atoms_and_molecules_fanouio7z.pdfIn PDF document text
    • http://wukixijolori.iblogger.org/56007552607.pdfIn PDF document text
    • http://speak4pro.com/89712622561w9608.pdfIn PDF document text
    • http://front-glass.website/anime_avatar_creator_full_bodyop0i7.pdfIn PDF document text
    • https://jukovuwivoxufab.weebly.com/uploads/1/3/3/9/133997180/3a07670b.pdfIn PDF document text
    • https://cdn.sqhk.co/tinodifozeza/foYAjdQ/11045659784.pdfIn PDF document text
    • http://grusha.space/snow_white_princess_miku6zdxp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luzarog.rf.gd/97566159937.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/epson_m244a_paper_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/free_baloch_liberation_army_video.pdfIn PDF document text
    • http://jejemizon.rf.gd/methods_in_molecular_biophysics.pdfIn PDF document text
    • http://pasemox.rf.gd/xetojonovebekototozaka.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_off0000f9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 5632 bytes
SHA-256: 53a4c41be3fe75c866752a4e2f816b93652751c8e6c222548e1519dcc59e7960
font_01_sfnt_off00010cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEA 11860 bytes
SHA-256: 10a57aa7e8d5d618b2bbb9048b0b4838ff86cc44364b3efa917e6ac56cc3eed2

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