Malicious PDF — malware analysis report

Static analysis result for SHA-256 6afd9a5104ab35a9…

MALICIOUS

PDF

73.1 KB Created: 2021-02-15 11:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 96e6b9bb7a84968e6ba6dea65ff94bd5 SHA-1: 3c25407a364426f1a07f109d3b04761f92117349 SHA-256: 6afd9a5104ab35a929bab2af99de96f4fc61ba05714c8d2a0abbe6c35ffdc339
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with one prominent URL pointing to 'jottigo.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to 'Vampire the Masquerade', likely used as a lure. No scripts were extracted, but the presence of external links and the nature of the heuristics indicate a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=vampire+the+masquerade+revised+character+sheet PDF link annotation
    • http://italywow.pro/linguistics_exercises_with_answerste72j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393900/normal_601dcf1a1a70d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_6014021edfe33.pdfIn PDF document text
    • http://gufutaca5.xyz/dirt_stock_car_racing_gamesu4fs4.pdfIn PDF document text
    • http://lasleymarkt.ru/58327849582prqyg.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
    • https://s3.amazonaws.com/vavapekadoliti/kaththi_ringtones_free_for_mobile.pdfIn PDF document text
    • http://romamosok.rf.gd/play_store_kaise_karo.pdfIn PDF document text
    • http://gikunipif.epizy.com/wetijesumipemujoxokupudi.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/duxanubemojonipirig.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/android_bitmap_memory_limit.pdfIn PDF document text
    • http://xarugutivi.epizy.com/cartoon_drawing_books_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37B 5096 bytes
SHA-256: 120a76a7fd1519d59b000b6276b6474b339777bf66daeefaa398f87ba98e5884
font_01_sfnt_off0000e4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D2 10792 bytes
SHA-256: b736cd7daaee753d0dfe4d13b9f80cc9bdcda3cbc0774df363c9451781e64874
font_02_sfnt_off000109a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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