Malicious PDF — malware analysis report

Static analysis result for SHA-256 f217a098dd7a9d5e…

MALICIOUS

PDF

75.3 KB Created: 2020-11-24 22:57:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b89aa9723241fc774af81b0b35cb29a1 SHA-1: 83de15182b3f86ec8fa35d0d35886e4e480c073d SHA-256: f217a098dd7a9d5e30b8bf6639230a8e2b73015c0bb7273c75e399ea80bf5e34
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'trafftec.ru', suggesting a phishing or redirection attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to host malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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://trafftec.ru/strik?utm_term=epic+seven+azimanak+hunt+guide PDF link annotation
    • https://nafarusulewabol.weebly.com/uploads/1/3/4/5/134587722/kinorik_gerosutuwod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf268a6e-e527-40a2-be34-7d0d424c2290/safige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b7e2ad-ece6-4091-8f5f-003f3779e22c/51209857103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a278bf11-8a0d-468e-9b2a-ef24c8e1c675/88049643212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a2caaea-2454-456b-b3bb-23b9db37ea05/84521987960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d95a003-373f-4b69-b95f-7b68182dbcc8/whistle_for_willie_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df0eca3f-fbd1-4ff9-aea8-427f6a65c220/16035759342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4896ff-f382-49f8-b027-0a76325cd476/jisezafut.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/comfortably_numb_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/adobe_photoshop_7._0_tutorials_in_telugu_free_download.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_off0000e86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86F 5488 bytes
SHA-256: 4a99e4ae8220730a1a2f564ba89fd4b6262033c1e29d72586e3d3b9ba36eca7a
font_01_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 11008 bytes
SHA-256: a83c243b30989484166bd5f717a99f31dc6ed59e52df1fb553f3ff920b66b6f6

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