Malicious PDF — malware analysis report

Static analysis result for SHA-256 585cffa29baa0047…

MALICIOUS

PDF

76.5 KB Created: 2021-03-31 13:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97038c6961e0a15799716c4cc4280c0b SHA-1: 7bbd74a5a8919d5bf6a837c27b8254fc3d04933c SHA-256: 585cffa29baa0047a75dee4ef505feb8cac25553d5f0c1e91de4a1ef1d4535b8
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple embedded URLs, including one pointing to 'druttle.ru', suggests a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=i+robot+oxford+bookworms+pdf
    • https://cdn.sqhk.co/xojelumegasi/iKhiWgh/omron_blood_pressure_machine_walmart.pdf
    • https://cdn-cms.f-static.net/uploads/4380522/normal_601e0c73ed52f.pdf
    • http://goodshopsales.xyz/how_to_pair_jbl_tws_10l6s78.pdf
    • https://cdn-cms.f-static.net/uploads/4474720/normal_60118fc058540.pdf
    • https://cdn.sqhk.co/ximegawaso/oigFigG/urban_arrow_warranty.pdf
    • https://cdn-cms.f-static.net/uploads/4365562/normal_6023abeab2bf6.pdf
    • http://zonitupupafof.sportsontheweb.net/abdominal_exercises_for_beginners.pdf
    • http://ideal-it.fun/the_escapists_2_escape_guideipkss.pdf
    • https://static.s123-cdn-static.com/uploads/4446649/normal_5ffa93163a864.pdf
    • https://cdn-cms.f-static.net/uploads/4453764/normal_6036f9faf1d9a.pdf
    • http://dosijefa.mypressonline.com/42300344255.pdf
    • http://sallely.xyz/94951301951oryb5.pdf
    • https://static.s123-cdn-static.com/uploads/4483337/normal_600752ac3075d.pdf
    • https://cdn.sqhk.co/fapewakuw/fe2jghc/letterboxd_pro_cost.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f3be2959-e4b6-4ac8-b048-e81ba0647f54/ms_drivers_license_format.pdf
    • https://uploads.strikinglycdn.com/files/df091104-2b26-4930-b71e-b9d7bd25dc89/mokozawulotibodire.pdf
    • https://uploads.strikinglycdn.com/files/3aec552e-b020-4c21-a494-19fdb02aee85/juxanuvaziwabeto.pdf
    • https://uploads.strikinglycdn.com/files/8ad854fd-c3d8-400e-8602-a36346a355de/nalosowupepadikuxizuzu.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_off0000ed3a.bin
c4e8fd872ff7600c1e7c15567b68443f9cbd3283e0e9585093c3c36bb8cdd079
pdf-font-stream PDF embedded font (sfnt) at offset 0xED3A 5248 bytes
font_01_sfnt_off0000ff14.bin
1df26a2a4e768f25ec21b2c3a3a0347de0779778ea8ae862979b424aab6c5955
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF14 11444 bytes