Malicious PDF — malware analysis report

Static analysis result for SHA-256 54af9df50544cb7e…

MALICIOUS

PDF

72.8 KB Created: 2021-02-18 21:32:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: efb46389211122fe2e36475da5940236 SHA-1: a2eca8516a9a2bfbed7640f58af12f92a5960abc SHA-256: 54af9df50544cb7e29270dbc770546190298709994525142f757c9bfeb51edb5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm on disposable hosting, with numerous external URIs pointing to potentially malicious domains. The document body, though heavily obfuscated, contains references to advertisement analysis and wkhtmltopdf, suggesting a lure or redirection mechanism.

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://baarspo.ru/strik?utm_term=how+to+analyse+advertisement PDF link annotation
    • http://nofuwev.iblogger.org/being_john_malkovich_soundtrack.pdfIn PDF document text
    • http://douchehub.xyz/xobinemaxevoxixf3fy0.pdfIn PDF document text
    • http://betflixguvenilirmi.com/suferimex9kd3e.pdfIn PDF document text
    • http://puzotupisebi.66ghz.com/tamil_movies_utorrent_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/hfcOghc/paguni.pdfIn PDF document text
    • http://davufemalolaj.iblogger.org/52558148391.pdfIn PDF document text
    • https://cdn.sqhk.co/salaseli/ha6ifnw/icon_clash_nike_shorts_pink.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/iaibhee/rifukarajunavudug.pdfIn PDF document text
    • https://mitumeme.weebly.com/uploads/1/3/4/8/134879381/55c61af6.pdfIn PDF document text
    • http://galoomer.online/romancing_mister_bridgerton_free_downloadrl86r.pdfIn PDF document text
    • https://talurepif.weebly.com/uploads/1/3/4/6/134603846/gejor.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/ropidadegaxut/my_talking_angela_apk_unlimited_coins.pdfIn PDF document text
    • http://malinaliwul.epizy.com/63921656212.pdfIn PDF document text
    • http://ninivekav.rf.gd/just_shapes_and_beats_free_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/wamuxomukuxitanetupepomo.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/wuxusazuradu.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_off0000deae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAE 5184 bytes
SHA-256: 77480abc29467bb78f990a646af43feabad60136cf089f39bae3a6ca585fa1a9
font_01_sfnt_off0000f055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF055 11272 bytes
SHA-256: e31a17b47f53629cbf12de9e04c32f79574652482f5702a48efceb8fd5421746

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