Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad3595f8e2b596c…

MALICIOUS

PDF

66.6 KB Created: 2021-02-17 15:13:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 73945c43270ce6fde8b37197509bc564 SHA-1: bb15e54c9efda415bb16de5d3037dcab31c94115 SHA-256: 3ad3595f8e2b596cb1ac7d8dd58099c4a05be059128065c7a9f872ab0ab00013
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is part of a link farm designed to attract traffic, further supporting a malicious purpose.

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/wb?keyword=sea%20doo%20service%20manual%202009 PDF link annotation
    • http://jijimaxugixu.22web.org/bike_game_korbo.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/ichjij5/66349574036.pdfIn PDF document text
    • http://betflixguvenilirmi.com/bijafenovoludikafw4dp.pdfIn PDF document text
    • https://dulewidojupetor.weebly.com/uploads/1/3/2/6/132695372/f12625.pdfIn PDF document text
    • http://adyga.site/baghban_full_movie_khatrimazajeas9.pdfIn PDF document text
    • http://trenolgia.buzz/17844151685j5kqm.pdfIn PDF document text
    • http://vezerfa.xyz/how_to_draw_anime_booksjv5hw.pdfIn PDF document text
    • http://betflixguvenilirmi.com/behind_the_glass_book5hnqe.pdfIn PDF document text
    • https://zesadokalefon.weebly.com/uploads/1/3/2/6/132681767/e0ac7.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/icWigep/never_gone_2016_full_movie_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/geegiS4/mozimagen.pdfIn PDF document text
    • https://worojuwoxalo.weebly.com/uploads/1/3/0/8/130814432/3271665.pdfIn PDF document text
    • http://koteyarn.moscow/argumento_cosmologicoda4jx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xifofemixogo.rf.gd/game_adventure_android_terbaik_offline.pdfIn PDF document text
    • http://ditaxaj.rf.gd/ropafojezepurosamogobes.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_off0000c720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC720 5676 bytes
SHA-256: ba991fa15cadc00d6bee292028a961cecafc0a0cd98ca19d18769320639f920a
font_01_sfnt_off0000da5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5A 10372 bytes
SHA-256: 30fe8778d2be87be6565cb43f99ce8aa0acd3bf5af2360dedfb12daf8634a00d

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