Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce6afa476c296ac…

MALICIOUS

PDF

42.1 KB Created: 2020-11-05 22:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1615fc5adf618ca58e28497629e5c58f SHA-1: 58dcee9da2af1976c327612c8c660b88f432c1b8 SHA-256: 6ce6afa476c296acf22afde3d02417127f398ed618b4e530a6b1a5be4a3253b1
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution T1071.001 Web Protocols

The sample is a PDF document that uses social engineering tactics, specifically a 'ClickFix' lure, to trick the user into executing a command. It also mentions password-protected archives, suggesting a multi-stage attack. The embedded URL and numerous other URLs point to potential download locations for secondary payloads. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffine.ru/aws?keyword=robotmon+service+manager+windows PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383470/normal_5f948eef3d6a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5f8ce96fa7e95.pdfIn PDF document text
    • https://gobexuxiwabi.weebly.com/uploads/1/3/4/3/134372757/b1c3e6ae9fa4fb.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/guwakajuwugokatodot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5f893f43c720d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/89381451543.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/wirehaired_pointing_griffon_rescue_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/ib_biology_hl_exam_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd64bbe-b43e-404d-85bd-c3a97213eb83/pefakob.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/tekemipi.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/fitinikapa.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_off00006499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6499 5528 bytes
SHA-256: de171eb905d67c77fd3e2d7dd88b30544257a6385b38728635a9348ad1c1219b
font_01_sfnt_off0000775f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x775F 10704 bytes
SHA-256: a9a85f404c1c4333886ccb459270960d1c1159b706fb9221a3cc43c07744399e

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