Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9bc4bd668d16cb…

MALICIOUS

PDF

77.4 KB Created: 2021-02-18 19:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b1bd870aca034701f3ce48a0e778e201 SHA-1: 75b2bb2adddfb6806a464a367fb394dae341a140 SHA-256: 9e9bc4bd668d16cb356fda59c896592138c55a030baed4ec189a2e358b5b2e83
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to disposable domains and are part of a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The document body, though partially corrupted, appears to be a lure related to a search query, directing users to malicious URLs.

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://maypoin.ru/123?utm_term=what+is+the+difference+between+a+buffalo+and+a+bison PDF link annotation
    • https://cdn.sqhk.co/rodisukipi/iaFWnhe/95782125991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496824/normal_5fda643509f91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422390/normal_5ffb433f268b0.pdfIn PDF document text
    • http://car-test.pro/lights_blast_projector_troubleshootingdc9b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447467/normal_5fcb68dc5a954.pdfIn PDF document text
    • http://arnautmebel.ru/43838172800o5fs2.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/a3NBI1a/xizarel.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/hfjchcF/dujonul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393028/normal_5ff263b8d0613.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421366/normal_5ff3ceb455700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421637/normal_5ffe4245c2f40.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/ghehaO1/hocus_pocus_cast_2_trailer.pdfIn PDF document text
    • https://guvijubeb.weebly.com/uploads/1/3/5/3/135318684/pipatefafujowiwufun.pdfIn PDF document text
    • http://perevod-card2card24.site/my_boy_gba_emulator_pokemon_download7ilat.pdfIn PDF document text
    • https://rewazute.weebly.com/uploads/1/3/4/6/134648352/14cae96e0e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE274 5236 bytes
SHA-256: eadc8158348983127d7628eafe49b1896d7f0c152411d6d42c150559c4d4e41a
font_01_sfnt_off0000f44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44A 10368 bytes
SHA-256: a74dd72a6b38f9d3ad43a3f47b11755ea5328cc844a2f6024bcd9e32295b411e
font_02_sfnt_off000117d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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