Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce812cc9c3dedc68…

MALICIOUS

PDF

67.9 KB Created: 2020-12-17 03:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64301beba7c146004cd5091a1f755584 SHA-1: d1299fc3f197c335f1f5018941e5d95cc61d13a3 SHA-256: ce812cc9c3dedc6806b12743977ade33e0808fec2592d8358d9c5440afb2b0bd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafficel.ru/123?utm_term=how+to+moderate+a+twitch+stream
    • https://gapidekejoz.weebly.com/uploads/1/3/4/8/134876705/3912861.pdf
    • https://banafazag.weebly.com/uploads/1/3/4/3/134325205/babb677.pdf
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/5374976.pdf
    • https://pinukavuzufov.weebly.com/uploads/1/3/4/3/134307945/5923018.pdf
    • https://ginefudev.weebly.com/uploads/1/3/4/4/134454890/4305794.pdf
    • https://tokafiwunan.weebly.com/uploads/1/3/4/3/134372509/vafavazalowezej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc0fe386b97992eb55c938e/t/5fc28c5818e72e5fdb2a6b25/1606585433776/recuva_apk_for_android.pdf
    • https://uploads.strikinglycdn.com/files/7668e7aa-5b2b-4d2f-9cc6-fbd0aa0c26c4/the_power_of_six_full_movie_free_download.pdf
    • https://static1.squarespace.com/static/5fc2a66ce5c7695ca9a6eb86/t/5fcc5dcd3ff1011540e7d71a/1607228877890/proxima_centauri_system_planets.pdf
    • https://uploads.strikinglycdn.com/files/a612b0d0-19a0-45e8-ab6f-6f754d730a11/create_or_destroy_water_5e_ice.pdf
    • https://uploads.strikinglycdn.com/files/347948de-7009-4b1f-ae0b-368d6bb5cfb9/9316434973.pdf
    • https://uploads.strikinglycdn.com/files/dc0edc1c-6ac8-4982-9360-5652ffb021e7/22799161424.pdf
    • https://uploads.strikinglycdn.com/files/7ea48f6d-7b20-42e9-b595-91afa3b4676d/bonepabofoj.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_off0000cdfa.bin
9ed2f9c596a8813c40ac93b0a55d81233270b3a0cb0cf2bcb0310fb6cdb8b96a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFA 5200 bytes
font_01_sfnt_off0000df8a.bin
54fa8e763f189adc3e7bc289d55202d87cb74843b71a05ab3f91ee77ee6a945a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8A 10352 bytes

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