Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f468c8569bb07e…

MALICIOUS

PDF

81.6 KB Created: 2021-02-15 08:48:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1dba9473e61c2723419a0b50f6b5e5b3 SHA-1: b088b0a0363f1b27041f8dfa844f506bef6cfd48 SHA-256: 27f468c8569bb07e5da5cfad190369a562cbc47f38148d194b43cfcc9ad90aad
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using such PDFs to host many links, often with UTM parameters, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=white+rodgers+air+conditioning+thermostat+manual PDF link annotation
    • https://cdn.sqhk.co/nizekidido/jdThjFe/rodunujolapenotuvot.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/bojegan_favexerukufogu_zozupesefuti.pdfIn PDF document text
    • https://cdn.sqhk.co/kapapomabu/NjbijgL/gewogexeduru.pdfIn PDF document text
    • https://dikajumexuw.weebly.com/uploads/1/3/4/3/134324924/telelojovugozimoja.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/jhzf4he/lotepuzox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474722/normal_5fcb553c98454.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460970/normal_600761a327b87.pdfIn PDF document text
    • http://gemajesubon.22web.org/12775038127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454544/normal_600a2063b9ccc.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/PgfdTeR/contract_assassin_mod_apk.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/f069a064f15d2b5.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
    • https://s3.amazonaws.com/wolina/22994308076.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/81235316177.pdfIn PDF document text
    • http://bevamixebigal.epizy.com/powerpoint_poster_template_90_x_120.pdfIn PDF document text
    • http://kizebemifovexe.rf.gd/dinamap_carescape_v100_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/31674167643.pdfIn PDF document text
    • http://dikubok.rf.gd/23738881419.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF555 5248 bytes
SHA-256: b22ea6f412e1f54db8101521f4024e5ba33256ba292385db7ee9e8e4bb548acb
font_01_sfnt_off0001070b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070B 10484 bytes
SHA-256: 92664aa458765ce40d4b9a8a938fa6361f72f75fdd2a064dad007a3a4485e3ba
font_02_sfnt_off00012ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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