Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3fd942a9ba801f…

MALICIOUS

PDF

63.3 KB Created: 2021-02-12 04:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a024558e1ea68ce5743ff15cbc870630 SHA-1: 4676d5143224d3ca84eca0e1b0aa7711c8ecd732 SHA-256: ca3fd942a9ba801f7f5ee1de5b21164d7051d050a9ef9d0146dad71a66ee1606
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least one pointing to a domain (`maypoin.ru`) that appears to be part of a link farm designed to redirect users to potentially malicious content. The presence of multiple disposable hosting domains further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=the+great+apostasy%2527%2527+catholic PDF link annotation
    • http://sepotutudi.iblogger.org/8620528459.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/3Xjcjh6/jotaxoruxidemopid.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/jununel.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/8iclqTd/someniwilixixapopuluf.pdfIn PDF document text
    • http://kanudivuvim.iblogger.org/38220389178.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474997/normal_5fec345aeec53.pdfIn PDF document text
    • http://sozefavi.22web.org/zuvusezogul.pdfIn PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/7623032.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/cihhiih/play_literacy_classroom.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/jBjgiaU/59861423085.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416501/normal_5feb331d82716.pdfIn PDF document text
    • https://modizotu.weebly.com/uploads/1/3/2/7/132740501/zisupazulerurudu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://komagodatile.epizy.com/ankleshwar_to_pune_train_information.pdfIn PDF document text
    • http://midetawedafete.epizy.com/zekakowawabopufugixip.pdfIn PDF document text
    • http://rowezezivifa.epizy.com/rogafapusab.pdfIn PDF document text
    • http://xumasadepa.epizy.com/sewing_machine_parts_crossword_answers.pdfIn PDF document text
    • http://bexudogi.rf.gd/virtronics_arduino_simulator.pdfIn PDF document text
    • http://kenozajawatulaw.rf.gd/air_conditioning_maintenance_proposal_template.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_off0000bd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9D 5280 bytes
SHA-256: dc2ed7a7b5a724c28c9d5605048ec9d41386576c39dd52e1ec92dd977131219d
font_01_sfnt_off0000cf9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9F 9488 bytes
SHA-256: 80ae85064d11a6846ed77d00d5df60fb8b788dffbf42ae2f1bd0075e9259b307

Open this report in the interactive analyzer, or submit your own file for analysis.