Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9e35137f8955a6…

MALICIOUS

PDF

81.8 KB Created: 2021-03-30 14:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2fbf1bf371eb5120fe72d8224e1b25bb SHA-1: 7caaabea659e389b1462562eb5eb9e728f14834e SHA-256: 7e9e35137f8955a6ee5c56fbd50a8a28e4e8661ea1130003e3807f03b4ebdfbb
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'pricing guide', aligning with phishing or scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/wix?keyword=eso+pricing+guide In PDF document text
    • https://cdn.sqhk.co/vituxezij/6Bihje0/skyrim_elder_scroll_id.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/41907778156.pdfIn PDF document text
    • http://lesuxofozadize.mygamesonline.org/last_lecture_book_notes.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/hgcigg2/formula_1_race_standings_2015.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/nice_guidelines_dyspepsia_2015o0hel.pdfIn PDF document text
    • https://cdn.sqhk.co/gopepilexafi/8iikfjd/google_sheets_templates_2020_calendar.pdfIn PDF document text
    • https://luzepomi.weebly.com/uploads/1/3/1/8/131856518/lawafejo_saviwevegeriv_gatibuzemadako_relusa.pdfIn PDF document text
    • http://sexedate69.site/tukorukimormyvc.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/aGja060/fefid.pdfIn PDF document text
    • http://casbah2point0.com/wupabunideladidistnh1j.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/nupubelanofaso.pdfIn PDF document text
    • http://bigezidara.mypressonline.com/vuwurozalekunawipotezer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rogofideb.onlinewebshop.net/ruminal_acidosis_in_cattle.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_d86d01c1cc5244a28b658363970ab545.pdf?index=trueIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_f88fc9ca454f4b2b8a4e02683b7ccb5a.pdf?index=trueIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_335c765ac5514503ae214276a4de2c28.pdf?index=trueIn PDF document text
    • http://tiwatimab.atwebpages.com/type_a_and_type_b_personality_test.pdfIn PDF document text
    • https://5c126656-fc4f-473b-8c99-11744d2e1b96.filesusr.com/ugd/abd8ec_aff124780ad046c0863de07408fcb870.pdf?index=trueIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_c36820608afd49cea568bdd7e6aa8053.pdf?index=trueIn PDF document text
    • http://pawepeg.atwebpages.com/12753893481.pdfIn PDF document text
    • http://wavexijazibivat.myartsonline.com/vupoxibar.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_off00010383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10383 4956 bytes
SHA-256: 1dd74702359dbd54e11539508aa2f0922b2e6a80805d4fc705f5d5de766855d6
font_01_sfnt_off00011474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11474 11192 bytes
SHA-256: 841f97d9c9e88b3f119da0d8b1ad7c0d51bc50a803e0c5ce2f83ed8dd290c8fa

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