Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e779645e445bb0…

MALICIOUS

PDF

67.5 KB Created: 2020-11-11 06:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 937754906157a6ff8f5013394ef2b371 SHA-1: 13598e53723557c6932d4e8f9e1ad1a8a0563430 SHA-256: e0e779645e445bb0ba8f0724af872d8f7e0a86b191238eb262aff62a558eb1a4
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The presence of a large number of external links, including a 'PDF link farm', suggests a phishing or SEO scam. The embedded URLs point to potentially malicious or deceptive content, and the document body, though heavily obfuscated, contains keywords related to scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffset.ru/123?keyword=josh+owens+oregon+scam
    • https://gafekiwukuwemul.weebly.com/uploads/1/3/4/3/134313713/629591ac324b.pdf
    • https://rogenogenitel.weebly.com/uploads/1/3/4/3/134316557/17fc208.pdf
    • https://jegupifak.weebly.com/uploads/1/3/4/0/134018348/salowufaresixupis.pdf
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/pisukin-nejofigorakimab.pdf
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/metavon_runokip_fisezefidiwade_kujis.pdf
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/9594994.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/purawuma/sketchup_google_play.pdf
    • https://uploads.strikinglycdn.com/files/7919c138-e93d-452a-92fb-1b1e88fcaf0d/rogero_3.55_download.pdf
    • https://s3.amazonaws.com/woxojuxafopuv/tomalasatelanuvafikotig.pdf
    • https://s3.amazonaws.com/henghuili-files2/ancient_egypt_map_activity.pdf
    • https://uploads.strikinglycdn.com/files/20d2dedf-4ae3-4f58-8e6c-24f90742aff9/limunataxuwadaze.pdf
    • https://s3.amazonaws.com/zufojadibi/chapter_10_review_states_of_matter_section_3.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_off0000caf1.bin
fd88db5d3b23719a59dffa7f10cb88771f3bd50209f795020434df5f10297697
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF1 5264 bytes
font_01_sfnt_off0000dcbc.bin
dd006530d9159a24730520ec861c413713e1ead3526eca1c58ae5c13fe16fd5c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBC 11032 bytes