Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4522d6470acabec…

MALICIOUS

PDF

64.4 KB Created: 2021-02-16 09:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 203d32ed30dae2974974bfd372a9e656 SHA-1: 71ba3afc2e38b50e604bfc14348b02216807a6e7 SHA-256: d4522d6470acabec0f7b6efd956593c237cdb2339ae4edbc75e941a332d5e46f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/strik?utm_term=telefon+fix+panasonic+kx-tgc210fxb+dect PDF link annotation
    • http://wellwork.site/raider_origin_adqgdz1.pdfIn PDF document text
    • http://shimano-stradic.ru/commercial_dough_sheeter4d2ah.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/47058808662nenfu.pdfIn PDF document text
    • http://agencymedia-ig.com/fefejepepagekal9crjr.pdfIn PDF document text
    • http://robertferrell.net/kablo_kesiti_hesaplama_formC3BClC3BCvgfbi.pdfIn PDF document text
    • http://harkateine.fun/24949500272604cv.pdfIn PDF document text
    • http://apsmall.space/tefimik0wdip.pdfIn PDF document text
    • http://beautysss.site/likilbu3xa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501509/normal_5ff5f041a322f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530990/normal_6023f91697aca.pdfIn PDF document text
    • http://healthyforczechrepublic.site/luke_combs_tour_songs_2019qrrq8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/51512173221.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/lightning_mcqueen_bed_sheets_queen_size.pdfIn PDF document text
    • http://ranedugipepin.epizy.com/my_android_phone_answers_itself.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_off0000bc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC54 5804 bytes
SHA-256: 96a38dfcb0864c16c78d45990bb0d42a985e35890accdaf1a6859d3992983b1c
font_01_sfnt_off0000d03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03C 10848 bytes
SHA-256: 1175c0c6659a3ac746a3883aca8bd44a7494e1082fa09563c908a238eab26a46

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