Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e182d3db1fe395…

MALICIOUS

PDF

76.1 KB Created: 2021-03-30 02:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9f1fb033c22beb2afebce2acde5599de SHA-1: d947a6ad5c6ea4c52b0fc13f6d6ff4e37db7c926 SHA-256: 41e182d3db1fe39505f1551a464e137e9800a73cedc00f6df8a80cae3861d36a
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one prominently featuring 'adobe brand guidelines 2020 pdf' as a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a phishing or malware distribution scheme. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://lozipotod.ru/award?keyword=adobe+brand+guidelines+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/dawezizupata/ihjaOjj/jifedivojun.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/murafimobaraniz.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzekofuwe/zLghico/76051179073.pdfIn PDF document text
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/topopigasegamuji.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/SZQuo5G/roblox_promo_codes_october_2020_free_robux.pdfIn PDF document text
    • https://vifinijeg.weebly.com/uploads/1/3/4/4/134479412/pazinivufat_sujoresemule.pdfIn PDF document text
    • https://didejigoximatex.weebly.com/uploads/1/3/1/0/131070501/boguv-xuxoxafiwa-peziz.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/in_bacteria_endospore_formation_takes_place_during.pdfIn PDF document text
    • http://rafale.store/wimarebazivoduxifajthb4e.pdfIn PDF document text
    • http://datinge.site/kubuporupusuvomuvirekewim0fp94.pdfIn PDF document text
    • https://kelebididoxo.weebly.com/uploads/1/3/2/6/132681806/budusivofixap-lugefagexox-fuzewoxi.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/27606108529.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/eI4ZDOX/46490536637.pdfIn PDF document text
    • http://ropewelopison.iblogger.org/reported_speech_exercises_test_english.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiroxivox.epizy.com/levenson_self-_report_psychopathy_scale_personality_tests.pdfIn PDF document text
    • http://padegijogul.atwebpages.com/can_you_get_your_permit_at_14_in_georgia.pdfIn PDF document text
    • http://zegisaxan.rf.gd/zadipulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e279ad-9713-4d27-b2db-b9757a39adcd/lozejikerevobavenokid.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_off0000eb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB24 5612 bytes
SHA-256: b96eaa34ce7741ea026b1724feb2fe2c35f7538e027c1eef518fea3fe5c9b242
font_01_sfnt_off0000fe45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE45 10416 bytes
SHA-256: e677bcbf878f999418df9df963172ee292c368a910d8c955d3db7e0ce2f560c8

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