Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f1064f3b079933e…

MALICIOUS

PDF

72.0 KB Created: 2021-02-19 18:06:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9f90adf4d04b6f7eab87b3e36fd141da SHA-1: fdd7eb1122ca17bc7298f43325ff30535d1a4a2a SHA-256: 1f1064f3b079933edafcd30d2766f69676972508827fcf9c7fd0703ac96ae3d8
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a prominent one being `https://jottigo.ru/123?utm_term=how+to+connect+phone+to+panasonic+tv+using+bluetooth`. This URL, along with others hosted on disposable domains, suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or serving a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=how+to+connect+phone+to+panasonic+tv+using+bluetooth PDF link annotation
    • http://miruzoguke.iblogger.org/91113875166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485809/normal_60242e9598765.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425484/normal_5ff686a0d1c2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494147/normal_5fd80a916a191.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/icghK34/25253778905.pdfIn PDF document text
    • http://rankingcoach-seo.com/p90x_ab_ripper_x_twitchtspc6.pdfIn PDF document text
    • http://instasurprise.online/best_exercises_for_nordic_skiingqchnp.pdfIn PDF document text
    • http://kapibijirupe.iblogger.org/confidence_fitness_ultra_pro_treadmill_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bikukasosisado.epizy.com/relative_clauses_exercises_with_answers_violet.pdfIn PDF document text
    • http://medemamonolusav.rf.gd/79506621004.pdfIn PDF document text
    • http://kafopazam.epizy.com/days_of_the_week_printable_worksheets_free.pdfIn PDF document text
    • http://sabuxixu.epizy.com/dosivijefolowo.pdfIn PDF document text
    • http://bofametif.rf.gd/zekavawilonijigedanez.pdfIn PDF document text
    • http://novizem.rf.gd/wowhead_bfa_mount_guide.pdfIn PDF document text
    • http://kefujaforu.rf.gd/galamikibalifaponotadig.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_off0000da22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA22 5352 bytes
SHA-256: 31fdf805f2a27237e573cd1d9bc48023299849d86d029dfe83e8479d3cb05e28
font_01_sfnt_off0000ec70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC70 11188 bytes
SHA-256: df59af51da9df5200195afb8dc1e39c62e9ad0c1216dc9ec62396753c6cdae6f

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