Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de72d46fc3ccf1e…

MALICIOUS

PDF

76.3 KB Created: 2021-03-01 00:08:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c40981228c87faaf9b1fb324d000af18 SHA-1: d26a46d4f362fb801b551e07e2a521669cb3f7e1 SHA-256: 8de72d46fc3ccf1eae4ec870c68a621b0d383bf0218f86f56e82009fcadc9290
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains and are flagged as a link farm. The ML classifier and ClamAV both identified the PDF as malicious, with ClamAV specifically labeling it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'calliope record' and the authoring application, suggesting a lure to a phishing or scam website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9744

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://dugedepap.ru/award?keyword=what+is+a+calliope+record PDF link annotation
    • http://xoroketogejuxe.mywebcommunity.org/hobby_ideas_for_characters.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/best_book_for_gate_mechanical_engineering_2020.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/simulation_with_arena_6th_ed.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/purebukugolupagidim.pdfIn PDF document text
    • http://profapp.pro/1080p_hd_video_player_for_pc_free_downloadu26iy.pdfIn PDF document text
    • http://complect-tech.ru/ismos_para_entender_o_cinema1o9bu.pdfIn PDF document text
    • http://subfamjtii.site/insurgentes_em_cabo_delgadoorytq.pdfIn PDF document text
    • http://helpcopyright-service.com/tommy_ds_wyndmoorqbzt0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/kujulawixuzi.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/7758160334.pdfIn PDF document text
    • http://letituxis.epizy.com/84218383092.pdfIn PDF document text
    • http://moliwofasekimu.epizy.com/miwuletivupulopelan.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/how_to_remove_splat_hair_color_from_skin.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/rakujodopewamifefe.pdfIn PDF document text
    • http://rizusuzapil.rf.gd/zisotexaluxonexonu.pdfIn PDF document text
    • http://jupuluna.epizy.com/24855992495.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 5176 bytes
SHA-256: e7e861153e325f7f77d0a6caeaf65e3193658729ef79f47d571eec0b00fcfc26
font_01_sfnt_off00010aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEB 10856 bytes
SHA-256: 3469581a3ac95a17046112b14afcb843e552a3d047ee70062dc16d9b0934e400

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