Malicious PDF — malware analysis report

Static analysis result for SHA-256 367c6cefe8288048…

MALICIOUS

PDF

69.0 KB Created: 2020-11-24 16:15:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c5b8609f6ac3ba913645299920f0c846 SHA-1: 5967bcd9d6b7d548d95e6002a67cefaaaf8ba936 SHA-256: 367c6cefe8288048df6fc9f8922cadcd37b9c511c9aff6cc2436ff507a38ba01
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/strik?utm_term=roman+forum+map+exit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489993/normal_5fba86fca4d71.pdfIn PDF document text
    • https://dutariviwasupor.weebly.com/uploads/1/3/4/6/134610277/a2e728c1697222.pdfIn PDF document text
    • https://pixabetamomu.weebly.com/uploads/1/3/1/0/131070001/doniwajorex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_5fbb6918cb385.pdfIn PDF document text
    • https://farisogu.weebly.com/uploads/1/3/4/3/134307724/5bbc6bebcd.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/posat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408485/normal_5f9a88ddd4864.pdfIn PDF document text
    • https://bazawafamojuw.weebly.com/uploads/1/3/4/5/134508147/momovosego.pdfIn PDF document text
    • https://parcocolosseo.it/en/visit/opening-times-and-tickets/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bepukuba/implosion_full_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/maplestory_5th_job_advancement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/guide_crossword_puzzle_clue.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_off0000d2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F1 4912 bytes
SHA-256: b6511fc94f3aa3929c32b14f67fe6cafedcebdc33532160470b92977c6113dbc
font_01_sfnt_off0000e39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39D 10780 bytes
SHA-256: 9f8ee8408f557d82c29e698a7355915149292f52924e153526fee2b58d50f984