Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb2441772467294…

MALICIOUS

PDF

69.0 KB Created: 2021-03-31 11:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03d355866c46fff999db16e1f3e9fad9 SHA-1: 8238a01a279d8045656b212e677a0fe2862c3632 SHA-256: 3bb244177246729438853b9c3b15f1ebe8603eaff45777ce44ed717e01ff123b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to malicious sites, likely as part of a phishing campaign.

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://jumiwimov.ru/award?keyword=logical+reasoning+and+mental+ability+pdf PDF link annotation
    • https://lolijizaw.weebly.com/uploads/1/3/4/4/134461821/800fc833.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/if9icHZ/spider_stickman_fighter_supreme_warriors_mod_apk.pdfIn PDF document text
    • http://rezanufeku.mygamesonline.org/enfoque_de_genero_definicion.pdfIn PDF document text
    • http://vofufime.mypressonline.com/30742821189.pdfIn PDF document text
    • https://misurenagikokiz.weebly.com/uploads/1/3/5/3/135332419/lepuwelojefamik.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxeneson/ji50ZcE/bluestacks_android_free_for_pc.pdfIn PDF document text
    • http://doweryklkq.space/mulapoximilegov4tqtp.pdfIn PDF document text
    • https://sezijaxafiv.weebly.com/uploads/1/3/1/6/131637080/978f10f639.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/excel_practical_test_questions_and_answers.pdfIn PDF document text
    • http://favunewesazut.sportsontheweb.net/frederic_bastiat_books.pdfIn PDF document text
    • https://cdn.sqhk.co/wirujurumugi/jWwZha4/gizexaziwasumubugagilem.pdfIn PDF document text
    • https://wovikuzejujitij.weebly.com/uploads/1/3/4/5/134506660/fodagiwuz.pdfIn PDF document text
    • https://zotaboxobur.weebly.com/uploads/1/3/6/0/136091523/tekiziniseb-senevuserazo.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/explain_the_purposes_of_writing_reports.pdfIn PDF document text
    • http://artyom.guru/189043790319sftx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ee746d-d160-4d10-981b-09623ea8efeb/fesigopilozaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad78372-a752-4a8b-b316-f50df22f695a/fun_home_read_online.pdfIn PDF document text
    • http://pexofapu.myartsonline.com/importncia_da_alimentao_saudvel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfff1cd0-b0af-408b-93ad-3fbce4aeec45/what_is_a_synonym_and_antonym_for_subject.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_off0000cf67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF67 5660 bytes
SHA-256: 335280b62647293674321819dcce5c301594a5ed1cb7de0ecd2a7b0667b73000
font_01_sfnt_off0000e29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 10680 bytes
SHA-256: ca2c4b5b77ad35a2d09e4261f91d23c47e616f3cc05c613026ba578a424f334a

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