Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a827e8032cfd8f…

MALICIOUS

PDF

84.7 KB Created: 2021-03-10 12:33:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 588034d77a442bc63a6b9ad75e8d10af SHA-1: 4dc9630bcf27f51d31a4dd5373fb54b2faba751c SHA-256: d9a827e8032cfd8f22074dac8fbb9f39b7b640d5cf21276b7034dc4a5c76f49c
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains and PDF files, suggesting an attempt to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=soccer+head+game+two+player PDF link annotation
    • http://mezajozugabaso.getenjoyment.net/84241398977.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/tipos_de_comunicacion_no_verbal_kinesica_proxemica_paralinguistica.pdfIn PDF document text
    • https://ginugifugebiner.weebly.com/uploads/1/3/4/2/134234672/4462515.pdfIn PDF document text
    • https://xokotenesuku.weebly.com/uploads/1/3/1/4/131438709/6e97a8.pdfIn PDF document text
    • https://varitutetuvux.weebly.com/uploads/1/3/1/6/131607805/tolik.pdfIn PDF document text
    • https://berisojelo.weebly.com/uploads/1/3/0/8/130874511/fa688c1a6a6f10.pdfIn PDF document text
    • https://nulivuxod.weebly.com/uploads/1/3/0/7/130776854/vixeben.pdfIn PDF document text
    • https://sojagifuwolu.weebly.com/uploads/1/3/4/6/134689160/6648432.pdfIn PDF document text
    • https://sipopupomiva.weebly.com/uploads/1/3/4/3/134307082/xiboli_lagefiwepe.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/sims_4_patch_notes_june_2020.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/d8eea618-70eb-4dda-841a-b7f80668dd39/best_rock_climbing_training_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/47712365714.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/jamugigefisoposeligele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/056be252-e79b-42c5-9a67-ce49c0cd5a1f/26559815781.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/automatic_gearbox_vs_manual_gearbox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/883d7afc-0682-4159-a710-427bba04d974/samsung_rf268abrs_dimensions.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/sudivapezuj.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/statistics_box_and_whisker_plot_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/12624487961.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/fagomumugukuxamomujam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b14e741-3166-4c1c-a570-cf3befb6cb2f/2004_volvo_xc90_repair_manual_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a94ccec-293c-4884-bbcc-7b2606699204/vizorevenadowo.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/31281801421.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/wosugamopazu.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_off00010f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F32 5604 bytes
SHA-256: ac089780004128cc9aca7d0892cab4283ec5836e9f67788d6e184e1d4a1b70c9
font_01_sfnt_off0001222e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222E 10296 bytes
SHA-256: e919b089ca435c7bbf6630dafaf3641df5c2429b9a24eb5622591c225491fe27

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