Malicious PDF — malware analysis report

Static analysis result for SHA-256 58966b9798024d36…

MALICIOUS

PDF

85.3 KB Created: 2021-06-06 14:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4f00d0cea364e802a2deb8192f6d78dd SHA-1: 5ffdd3349c09d2eba55059a1597b6b506e063805 SHA-256: 58966b9798024d363559a8b9dd14d0677c1273cbbbd34b639cc9ba3a22e9f2ba
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'https://dafemum.ru/123?utm_term=maslow+theory+of+motivation+ppt', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Maslow theory of motivation ppt' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/123?utm_term=maslow+theory+of+motivation+ppt PDF link annotation
    • https://lejezobuvisejo.weebly.com/uploads/1/3/4/7/134763899/tiripazazala-latiragunus.pdfIn PDF document text
    • https://tamalokumolegi.weebly.com/uploads/1/3/4/6/134656593/gukadosimajilapig.pdfIn PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/bumoserewadal-pixoxeke-nusenovug.pdfIn PDF document text
    • https://xorusisu.weebly.com/uploads/1/3/4/3/134314808/vabonetepa-rojonuteri-kozusire-fikujo.pdfIn PDF document text
    • https://fagedanagaga.weebly.com/uploads/1/3/4/8/134876409/bisara.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/guzudebinigop-rabifad-limoxisemi-jurikepof.pdfIn PDF document text
    • https://wetikifavuzimol.weebly.com/uploads/1/3/1/6/131606122/kuxujikukefafogularo.pdfIn PDF document text
    • https://gamupizesusaza.weebly.com/uploads/1/3/1/3/131398140/a0afd7267.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niwomif.pbworks.com/f/89028019831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/756a5a1e-4b6c-493e-aa7f-28f224074ea4/canon_eos_t5_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26dc2dac-42e1-46f1-b415-341a853978f0/70640355138.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144561222/fenug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6110230-c3b5-4deb-b747-bca92bf1cbf8/wedukatosixebudakakowod.pdfIn PDF document text
    • http://xiwitanul.pbworks.com/f/notaresut.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/w/file/fetch/144616572/what_is_systematic_geography_class_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d14b048-7dde-4333-8ae7-c69946f9ad26/reaccin_de_combustin_completa_e_incompleta_de_hidrocarburos.pdfIn PDF document text
    • http://redelaw.pbworks.com/w/file/fetch/144587712/super_mario_64_multiplayer_hacks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d257407-9d7d-46b1-a758-950132acaa8d/excel_urgent_care_spring_cypress.pdfIn PDF document text
    • http://redelaw.pbworks.com/f/bar_san_sebastiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b02d2c-f8df-4c57-affa-7db2104c6c91/formato_declaracion_de_bienes_y_rentas_dafp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a391c031-a450-42f4-86c2-0ff05de56a2e/how_to_replace_samsung_chromebook_screen.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_off00010f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F62 5400 bytes
SHA-256: cd6dba208f63d32c07b7c4df89946364bb1340981a745ad3fbe69b63034f3391
font_01_sfnt_off000121bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BB 11252 bytes
SHA-256: 6b2cfd5b5cb8d7089b2422047042478d25e6db46e7d303040b4953a7d1157482

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