Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b70d5f6e23148b…

MALICIOUS

PDF

76.2 KB Created: 2021-03-31 04:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 996bf5f2a67499bc2aa449127ad62a0b SHA-1: 2994becb91ffd3a40183d4e259202434b349e98f SHA-256: a9b70d5f6e23148be111dec7b086235ca5fb9f5220d6914efdf73b99c5658a44
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure for downloading the document, which is likely a malicious payload. The document's content, though heavily obfuscated, suggests a deceptive purpose related to a free download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/wix?keyword=data+analytics+made+accessible+pdf+free+download
    • https://matamelo.weebly.com/uploads/1/3/1/3/131384575/pufisulam.pdf
    • https://babidunilatejob.weebly.com/uploads/1/3/4/2/134266015/togujifonajowagurid.pdf
    • https://rojofasefimo.weebly.com/uploads/1/3/1/6/131636828/1461517.pdf
    • http://br1.red/management_reporter_process_service_won_t_startttxah.pdf
    • http://asia.kiwi/113158370g4ckc.pdf
    • https://varovugunigode.weebly.com/uploads/1/3/4/4/134480676/karuwoli.pdf
    • http://kojanusipesipe.scienceontheweb.net/vulesowasomanib.pdf
    • http://gugolufixa.mywebcommunity.org/jutumadi.pdf
    • https://kobuzonoge.weebly.com/uploads/1/3/1/4/131452837/zubafokute.pdf
    • https://static.s123-cdn-static.com/uploads/4485810/normal_5fe309103dba1.pdf
    • http://rakapugijumub.sportsontheweb.net/tipos_de_cilindros_hidraulicos.pdf
    • https://cdn-cms.f-static.net/uploads/4408721/normal_60501d4bb592e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_05ba4cbdb26140d9a406c2f0324007d6.pdf?index=true
    • http://mutiwudixoni.rf.gd/el_marques_de_sade_120_dias_de_sodoma.pdf
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_e5c9cdd338e543cf882b5873957daa0f.pdf?index=true
    • http://sozogakuvigoxev.epizy.com/xivaduroduzolur.pdf
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_d25be0d0c1984600bb71943feb19a292.pdf?index=true
    • http://vopuzed.rf.gd/gsm_autonomous_car_parking_project.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea66.bin
674c759a8a322407d2aae7c102e297090f58e8308422ce3c821a48d065e80480
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA66 5636 bytes
font_01_sfnt_off0000fd95.bin
b9ffe7b8161aa7c32b02ba84e32648d7a5fb149f967a94ed2070b8435b12e36c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD95 10664 bytes