Malicious PDF — malware analysis report

Static analysis result for SHA-256 848c5333c49e8750…

MALICIOUS

PDF

75.5 KB Created: 2021-03-09 12:39:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 736daf1fe7f880917e8f3ee9e5bb9855 SHA-1: 1ce02de778fe1c9c06a526b76355910c7d6c82dc SHA-256: 848c5333c49e8750802cca6976edddc590e084a17b08a478f1b8f8f97b0eb8e4
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely leveraging T1059.007 if JavaScript is present within the PDF's internal structure to facilitate redirection.

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://xezojetit.ru/award?keyword=ideas+for+english+club+activities+pdf PDF link annotation
    • https://cdn.sqhk.co/reretukida/TOHY0kj/nofipevo.pdfIn PDF document text
    • https://xesusilinani.weebly.com/uploads/1/3/0/8/130874458/lutofedumixapiv-kinumudolozi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_60244920d8859.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/9cc99d.pdfIn PDF document text
    • https://cdn.sqhk.co/ketifoseja/u0Thjii/30290643892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_6033dafe92b8d.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/dyson_ball_animal_2_upright_vacuum_purple_refurbished.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/EhjXSgd/best_piano_lessons_online.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/70728449078.pdfIn PDF document text
    • https://fakibugopozap.weebly.com/uploads/1/3/2/7/132712115/2471af36d.pdfIn PDF document text
    • https://kikoxelila.weebly.com/uploads/1/3/4/3/134335894/monulefumise_ponimi_dokeviduwuf.pdfIn PDF document text
    • https://kavejujutafen.weebly.com/uploads/1/3/6/0/136022690/510091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_603fbd5110dd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393893/normal_603216d3dbbd8.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/icPyjap/56091081279.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tikomiwewo.atwebpages.com/tabla_de_conversion_de_pulgadas_a_centimetros.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/kabbalah_revealed.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/expectations_in_relationships_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/70050959454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d38c80e-8b0f-447f-830a-de3cf562d7bc/2013_dodge_charger_sxt_awd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc438334-9e73-4462-bc97-16413225f208/krk_rokit_g4_5_vs_7.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_off0000ea3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3D 5556 bytes
SHA-256: 5a09e7552f8f5fdd7a89401fa6c08e6a9230ca9df4aa76cfb7674093a08646b8
font_01_sfnt_off0000fd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1E 10548 bytes
SHA-256: c75cce3362671194c9b8cf20be43cc3bd16dcf4b8561838228ec004b104572b6

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