Malicious PDF — malware analysis report

Static analysis result for SHA-256 190aa39ec1a4c749…

MALICIOUS

PDF

79.2 KB Created: 2021-05-31 23:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: bfa41eb79275c089edd0802d9e09673c SHA-1: 3d74149579fc976c813c6368afd6dc96b7108aff SHA-256: 190aa39ec1a4c749d74ea789121b979ff0b50f5d49eabb1b19757f5cf6bdffc6
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ClamAV as a phishing trojan. The ML classifier also indicates a high probability of maliciousness. The document body, though heavily obfuscated, contains text related to a movie search, suggesting a lure to a malicious URL for potential phishing or malware delivery.

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://pelibifir.ru/123?utm_term=bhagwan+dada+movie++hd PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4478951/normal_5ff280b392013.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415068/normal_5fe32a37073f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_605d20df05a0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416331/normal_60017a311e3d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470385/normal_5fe529ae38364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425217/normal_60287a4e62ae5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412568/normal_5ff9bad6ab080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_603291364f845.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kejuziz.pbworks.com/f/fixegozibug.pdfIn PDF document text
    • http://gifavipa.pbworks.com/w/file/fetch/144419067/sixeloxusukeviju.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144424704/how_to_select_electrical_cable_size.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144413955/lanutefowin.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/f/pijejodesafa.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/68949923709.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/f/free_full_movie_downloader_software_for_pc.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/f/voteredosusipotil.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/144422292/69837674700.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/f/15046864743.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE574 5132 bytes
SHA-256: 5b6acec6854bb2d4a4279497b9cdb18b197626c80e4300079ad6dc3e92e3563c
font_01_sfnt_off0000f6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E0 10396 bytes
SHA-256: 290970e11e90f9e1fdc3dbd2a339fb77d716685e4462097f00ab0a8548d81725
font_02_sfnt_off00011ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB2 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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