Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f5269451095af6…

MALICIOUS

PDF

105.7 KB Created: 2021-03-23 04:43:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 74e9ca606c1081e3b101e56b307f7c7f SHA-1: 6eb4621462f9da69a1853379a6ebaa4665c6cad9 SHA-256: 41f5269451095af608101f69bc4c7d7081a84d2214234a9bcc9d5edc7364178a
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojanized PDF. The embedded URLs, particularly the one on 'xajibur.ru', suggest an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious intent by indicating the PDF is part of a link farm designed for deceptive purposes.

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://xajibur.ru/award?keyword=large+scale+scrum+more+with+less+pdf+download PDF link annotation
    • http://meine-gebuhrenfrei.com/ejercicios_de_lectura_de_comprensinqiscd.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/hS1Xjfp/crowdfunding_real_estate_returns.pdfIn PDF document text
    • http://womans30planet.com/zopenawizuporolodiketecp7nd.pdfIn PDF document text
    • http://berabufepibaj.iblogger.org/foxilemiwu.pdfIn PDF document text
    • http://craftsmansmetics.com/lonely_planet_sweden_ebook_discount_codez9m5z.pdfIn PDF document text
    • https://cdn.sqhk.co/xakalodesi/fheiajf/starcraft_autumn_ridge_rv_reviews.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://543e2b4d-9699-46d2-9656-875e860b8e63.filesusr.com/ugd/fb32d0_4852895b0a2841b28976a5c25667555b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/gidowumezuxifazukanazalov.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/greek_gods_honey_yogurt_ingredients.pdfIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_5adb2cb96c4043f3a0400d07853b62af.pdf?index=trueIn PDF document text
    • http://sawuliwinupunud.epizy.com/kawasaki_fh580v_manual.pdfIn PDF document text
    • http://loxosonupod.rf.gd/ana_atorresi_los_generos_periodisticos.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/64804915359.pdfIn PDF document text
    • http://raziwisubuza.rf.gd/gopro_hero_6_black_user_guide.pdfIn PDF document text
    • http://zenomidesedi.rf.gd/22938853343.pdfIn PDF document text
    • http://wamigogobug.epizy.com/ginasewi.pdfIn PDF document text
    • http://sofidubanelen.epizy.com/nortel_m3904_telephone.pdfIn PDF document text
    • http://moxowofabijis.epizy.com/fuzibevumadobekal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D4B 5484 bytes
SHA-256: e90b20effaacf26d52dc5632737a0e96f88c4169a546095d79a72347951718c5
font_01_sfnt_off00015fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FDC 13320 bytes
SHA-256: ff19dc7d9ad195e53e4283bccc768124c07608fcfd4020e07a3702c8f24b5bf2
font_02_sfnt_off00018b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B40 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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