Malicious PDF — malware analysis report

Static analysis result for SHA-256 341869e795c7cb15…

MALICIOUS

PDF

157.1 KB Created: 2021-02-25 07:50:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 27c31ceb7ecd626dcc66404b42f7b76a SHA-1: 4a7f6578bc9d166993afe05eee4fa7551c6d68bc SHA-256: 341869e795c7cb15d42119969ff94304d136c29f61882936a9f6499d609f6330
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and potentially malicious hosting, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://baarspo.ru/award?keyword=queer+phenomenology+amazon PDF link annotation
    • https://wuzakadebetes.weebly.com/uploads/1/3/0/8/130814976/12a82.pdfIn PDF document text
    • https://tubekari.weebly.com/uploads/1/3/1/6/131636965/xelara_bibexezoloxox_wijokejefufile.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/itUpheN/kafov.pdfIn PDF document text
    • https://minoximamus.weebly.com/uploads/1/3/1/4/131437876/3199c4002d4.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxodinumoro/eOEiajb/ruwifizix.pdfIn PDF document text
    • http://bubble1.space/51384798236hnhb2.pdfIn PDF document text
    • https://desalipi.weebly.com/uploads/1/3/2/6/132681317/durinokomifa-norabisilelo-notodojekepelok.pdfIn PDF document text
    • http://prosale.company/how_to_say_monetu3oka.pdfIn PDF document text
    • http://jupizuginilumop.22web.org/free_bandwidth_test.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/who_is_the_best_portrait_painter.pdfIn PDF document text
    • http://wasizematimom.rf.gd/87884482014.pdfIn PDF document text
    • http://wajutomagavugaz.epizy.com/lemamitufudatutob.pdfIn PDF document text
    • http://pulijivugis.epizy.com/51449694182.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22506 5268 bytes
SHA-256: b2f1465525a0153bb4fc41ce5f1173ca755aa4cdee99081a99447474576d46cc
font_01_sfnt_off000236d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x236D5 15384 bytes
SHA-256: 45c15ceccc5c47fa62f86c4808fb5304e58c08d7fda15b0052dee77b8f905179

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