Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf2cff8f7023aa4…

MALICIOUS

PDF

70.1 KB Created: 2021-09-30 14:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b510cc37acfac038854995c3cf630a96 SHA-1: 8c64a0b7f4e6cb58af01fe9f6526359a0cc1596a SHA-256: bdf2cff8f7023aa41c6d04f11db58d5a1975d2625aaef434ff44c2eacddd4e44
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous links pointing to disposable domains, a common tactic for distributing malware or conducting phishing campaigns. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to lure users into clicking malicious links, likely as part of a spearphishing attachment campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/5f6322c1eea99d55b3cc71bf580be1b3/91110746042.pdf In PDF document text
    • https://tdfstore.it/file/68438974426.pdfIn PDF document text
    • https://tainandentist.com/uploads/files/202109052204302846.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/37514724089.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/15235103639.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/75421221895.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/55995113405.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/puliz.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/pifegizatikeziridowanavep.pdfIn PDF document text
    • http://srilakshmienterprises.net/uploads/leribenodurobogeka.pdfIn PDF document text
    • https://plasterglasgow.com/fwd_docs/file/42822541453.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/tefewetadizekawowakiro.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/83891621410.pdfIn PDF document text
    • http://freeorden.com/media/file/nopobetelaporabafu.pdfIn PDF document text
    • http://balone.net/_upload/file///74273671876.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/90340342253.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/siradidaviva.pdfIn PDF document text
    • https://ef.msfoody.com/upload/files/49681136056.pdfIn PDF document text
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/78652437649.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/44413304465.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139972a4b658---73022699415.pdfIn PDF document text
    • http://isleford.com/filespath/files/20210905160727.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/dalumumimep.pdfIn PDF document text
    • https://silverstonedevelopments.com/ckfinder/userfiles/files/71388878832.pdfIn PDF document text
    • https://perkunasstudio.com/uploads/files/202109051257181113.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=best+site+to+download+english+seriesPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC08 15044 bytes
SHA-256: af3286e097738d4da765cb9b39fa7ddadeb40cbe7c49cb7266774e1f97940eb5
font_02_sfnt_off0000f1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 10668 bytes
SHA-256: 7b75c93de47612e30f60b2cd4790cc149cf274d18b6a73b8e8ce5af81975af9c