Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebba38692a8a8a4…

MALICIOUS

PDF

67.9 KB Created: 2021-02-15 08:39:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 736f00373befb63971567b025bc94843 SHA-1: e15759f9f5fe48f27e9f1679077181b8fe9e5a38 SHA-256: 7ebba38692a8a8a496969492d2e197c103f7c952a5644be3206a336b9a10725b
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

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://seumenha.ru/123?utm_term=love+hurts+quotes+tagalog PDF link annotation
    • https://xixemoxutosiseg.weebly.com/uploads/1/3/4/4/134473276/9151979.pdfIn PDF document text
    • http://goguduve.iblogger.org/28288330490.pdfIn PDF document text
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/tenuxitojow-katesuxilas-bikifimanipose.pdfIn PDF document text
    • http://erkutungotu.com/mehandi_circus_movie_song_bgmc8lgo.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/16326087061q94zz.pdfIn PDF document text
    • https://cdn.sqhk.co/jifedibodo/7hib2UH/54775227800.pdfIn PDF document text
    • http://dawuxapi.iblogger.org/bella_popcorn_maker_manual.pdfIn PDF document text
    • http://on24-system.club/24248505273l1h2t.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/heicgiX/mix_paint_to_make_brown.pdfIn PDF document text
    • http://hytri.com/bituvapivuxisodkpl7f.pdfIn PDF document text
    • https://cdn.sqhk.co/xagogudexo/jidhbhd/duzisarovaselirurazubi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zapofekeba.rf.gd/12354318997.pdfIn PDF document text
    • http://nifekubipaxo.epizy.com/book_cover_design_ai_file_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/best_chess_learning_app_android.pdfIn PDF document text
    • http://fufagarafe.epizy.com/90895793032.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_off0000cc44.bin
25e719c5e57646d53c38d6fec9c0ba27736b6dffc08a80a87c6943ba8f9402e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC44 5076 bytes
font_01_sfnt_off0000dd89.bin
b335213538df7918d4a6e3612aebe50d3f4d91dde1f862168798d5a2c5f94ad7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD89 11248 bytes

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