Malicious PDF — malware analysis report

Static analysis result for SHA-256 81c768ddacdec08b…

MALICIOUS

PDF

77.7 KB Created: 2021-02-27 11:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: abe8ce70b84764992e69e9f12264afd7 SHA-1: 06cdae272054bc7572b782d3163cb675e76ffce8 SHA-256: 81c768ddacdec08bd383604a19d2700ad2a8fd1d0c87780560444bd22917172a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'World War Z movie free download', indicating a phishing or scam attempt. The presence of external URIs and link farm heuristics further supports the malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9191

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://lozipotod.ru/award?keyword=world+war+z+movie+free+download PDF link annotation
    • https://muwikoli.weebly.com/uploads/1/3/2/7/132740525/900d96e7b1bbc9c.pdfIn PDF document text
    • https://jubiporosevuzu.weebly.com/uploads/1/3/2/6/132695682/1f41a7ac0.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/fujitsu_fi-7160_duplex_scanning.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/tavel.pdfIn PDF document text
    • http://50offit.pro/how_to_treat_a_cystic_pimple_overnightz2afp.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/88828938325.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/how_to_do_escape_room_on_zoom.pdfIn PDF document text
    • https://danuredotur.weebly.com/uploads/1/3/2/8/132814989/xumopusofosag.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/94739148996.pdfIn PDF document text
    • https://xofezariro.weebly.com/uploads/1/3/1/8/131871505/77ce37870f80d.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/16979139146.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/bazadogenawabibipekemafi.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/what_is_via_character_strengths.pdfIn PDF document text
    • http://service-hire.com/autocad_drawing_software_download_for_pc4uns1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wonanikapudidak.atwebpages.com/7492924176.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/how_to_measure_productivity_at_work.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/dueos_de_los_medios_de_produccion_del_feudalismo.pdfIn PDF document text
    • http://jirabasojexosud.atwebpages.com/72375026327.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FE 4800 bytes
SHA-256: fa4e32de857451ab0e127b4c65fbdce5e4408d2e25c6ffdb206d5d4f8cf40a00
font_01_sfnt_off0001044f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044F 10504 bytes
SHA-256: 0addc59129da30e9e568463a80aa2871fd71b88eb299f31d9dc677261eccd35c
font_02_sfnt_off00012836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12836 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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