Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffd6e68cbefe362…

MALICIOUS

PDF

72.0 KB Created: 2021-02-27 05:59:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b0ca43c6eb61d0bda007be5c266252e2 SHA-1: bb044f9ebf00eca33f98430ecf05d804aa380fe9 SHA-256: 0ffd6e68cbefe36246963a32280f3c6f1456137c80084811ebadbb9c8ec5987c
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one specifically pointing to 'jottigo.ru/award', suggesting a lure related to product deals. The PDF's structure and the presence of external URIs, combined with the ML detection, strongly suggest it's designed to redirect users to malicious content or download further payloads.

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/award?keyword=sandisk+clip+jam+bluetooth PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4506170/normal_5fe4173f29c44.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/33ghe1h/unicorn_calculator_kmart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_600d5dd29fbfd.pdfIn PDF document text
    • https://cdn.sqhk.co/sidogorego/iixgeBI/lidalum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402520/normal_601100573ec32.pdfIn PDF document text
    • http://semengergel.ru/why_does_my_samsung_dryer_not_spinpq39f.pdfIn PDF document text
    • https://cdn.sqhk.co/kidimezamos/6ggragh/54061365565.pdfIn PDF document text
    • https://cdn.sqhk.co/tobijoge/ThcwUdx/13320595892.pdfIn PDF document text
    • http://vpntop.info/bridge_over_troubled_water_piano_sheetk6c3w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bamasagure.epizy.com/capital_structure_and_firm_performance_in_ghana.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/statistics_normal_distribution_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/assurance_wireless_application_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/35585052710.pdfIn PDF document text
    • http://jikokajogov.rf.gd/waxajuz.pdfIn PDF document text
    • http://zemagarekerak.epizy.com/bubble_bobble_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/linunutozaw.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/the_blacklist_sylvia_day.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/36029059819.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_off0000dbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD4 5600 bytes
SHA-256: c930966db78c1b1204f1b4ebf082dac0e9b9159b1d8e9b717180cdba6ece2529
font_01_sfnt_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 10640 bytes
SHA-256: 7a98fb3f91f1881a06c98f4aa253c603076e3dafa36ff3292b6716b5bac8d32d

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