Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cdff65683d9e5cd…

MALICIOUS

PDF

73.4 KB Created: 2020-12-30 11:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 27961d7481f8935567b5ebe667fb7cbc SHA-1: 706b238fbf535dccd5b9e1a7bf1f4c7731809715 SHA-256: 8cdff65683d9e5cdefa0431655366bb17482b6e2fd7bf0010abb73c30cd77356
214 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to link farms designed for SEO manipulation. One critical heuristic indicates a link to known malicious redirector infrastructure, specifically `https://cctraff.ru/strik?utm_term=monster+shooter+2+application+not+licensed`, which is presented as a licensing error for a game. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=monster+shooter+2+application+not+licensed In PDF document text
    • https://tomavibevojivow.weebly.com/uploads/1/3/4/0/134016690/4800207.pdfIn PDF document text
    • https://mowazaxof.weebly.com/uploads/1/3/4/7/134704653/358534b0b5cf3e.pdfIn PDF document text
    • https://tisikifa.weebly.com/uploads/1/3/4/6/134614219/ecfbb8.pdfIn PDF document text
    • https://mikudope.weebly.com/uploads/1/3/5/3/135305195/nekuxojadepufam_kedekula.pdfIn PDF document text
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/5433957.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/zoromexemuzid/redgard_uncoupling_matt_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/javonitatote.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/purble_place_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/tejazotudijafojuzedaba.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/nitelimonerira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ada8b6-8c8d-47dc-a167-551690a1f208/reds_stadium_seating_layout.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/bezold_jarisch_reflex.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/zizaju.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_off0000e026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE026 5296 bytes
SHA-256: aa35222a503cd172b3abea985556bfe07647d78b9d2b9fc84168479eaf6e7a28
font_01_sfnt_off0000f22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22A 11356 bytes
SHA-256: 07d23aee8f49105b6e5b409758e3e8cd0ca80908c952720e60f7bed8b61b93ad

Open this report in the interactive analyzer, or submit your own file for analysis.