Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26d6246791c5d46…

MALICIOUS

PDF

78.8 KB Created: 2021-02-16 23:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6bac1b1fa5220e8c7bd4b65adfa5f361 SHA-1: 042d016b06110a8d7963ba8dab18e74f2ed624a1 SHA-256: e26d6246791c5d4682018a869db98cd406b2a817957fcf64f95196679dc546e3
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's content is designed to trick users into altering payment details. The presence of numerous external URLs, many hosted on disposable domains, further supports a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://druttle.ru/wb?keyword=how%20does%20a%20check%20show%20up%20on%20bank%20statement PDF link annotation
    • https://sanijala.weebly.com/uploads/1/3/4/8/134889677/wiwisevazunoj.pdfIn PDF document text
    • http://muluwusive.22web.org/fuxowamupezixotoxizisujol.pdfIn PDF document text
    • http://zojulosopejozaz.iblogger.org/xiginig.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/ghmkjjw/18687429779.pdfIn PDF document text
    • http://xobaxibudizoba.22web.org/31815954515.pdfIn PDF document text
    • https://kazarebowuw.weebly.com/uploads/1/3/5/9/135972211/zarunazarafu_pezejixulexidaz.pdfIn PDF document text
    • https://cdn.sqhk.co/bemovunilupo/jhmjejc/costco_samsung_family_hub_counter_depth.pdfIn PDF document text
    • https://vilabusifa.weebly.com/uploads/1/3/0/7/130776169/pididoneg.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/b8ie5gg/clockwise_meaning_in_tamil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kozifina.epizy.com/calidad_de_vida_y_trabajo.pdfIn PDF document text
    • http://magivekuwili.rf.gd/2295705130.pdfIn PDF document text
    • http://livunox.rf.gd/miniature_circuit_breaker_siemens.pdfIn PDF document text
    • http://mibesajaku.epizy.com/35309533516.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/stacked_waterfall_chart_excel_template.pdfIn PDF document text
    • http://jitelujojutomu.rf.gd/reliance_industrial_infrastructure_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/3d_perspective_business_model_canvas_powerpoint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/16854295844.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/betrayal_of_india_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/gozezaxibareserelogi.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_off0000f5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C6 5444 bytes
SHA-256: 4718bb0e671df8badc562f17a8e7956cfb8043196e07b8be1f735f4e6f2a0567
font_01_sfnt_off0001082f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082F 10904 bytes
SHA-256: 09b02896035c9eaff8b6aadeb80a9b3d38665a211e6c78e56a14845aac81afdd

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