Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb3acbc10addd40…

MALICIOUS

PDF

90.7 KB Created: 2020-12-18 21:56:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7c3ffc5a4f6750cee7ca1f5e428c836e SHA-1: 12f170afbf0f3d2f746ef928f525259f711963c3 SHA-256: fdb3acbc10addd40c6aa495596274d59db0e87781b5ca31987b3290de25ec15f
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, with a critical heuristic identifying a PDF link farm. The primary malicious URLs identified are trafffe.ru and vewusijonaw.weebly.com, suggesting an attempt to redirect users to potentially harmful content or phishing sites.

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://trafffe.ru/123?utm_term=profanity+in+public+places PDF link annotation
    • https://vewusijonaw.weebly.com/uploads/1/3/4/4/134489037/a0cfb6afb1.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/9234837.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/zenubosul_rutufiso_kumojogopedi_jutatidasofiv.pdfIn PDF document text
    • https://jiwamotezonadiw.weebly.com/uploads/1/3/4/3/134325797/4784606.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/jomukirenetalezatobi.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/5f89cf12-0586-45ac-afda-888f99eaa00e/rheem_rtgh-95dvln_9.5_gpm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/489317f7-8490-4aea-a0d8-be1caa33d635/88392216182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c50e4fbd-8b19-436d-987b-6ddebf85e97f/57296655724.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4b50f8cdb769c6d8ed0a/1606372180568/66279985876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8338b8cf-4805-455f-b0ae-914ed28f9263/83118853432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05291992-d7be-4255-95bc-06781ac65316/38776010160.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BA 5252 bytes
SHA-256: 1b2df59fd950a2b4beaab18f0cd47886cf9849bca3842afb9aa802be073bfed7
font_01_sfnt_off00012aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA1 2536 bytes
SHA-256: 17f9c434be76b485df9bda451b8203c93c381154abc1b1a3c99bdbecb50127a9
font_02_sfnt_off0001358b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358B 12520 bytes
SHA-256: 0512185882c14b5d63754dbe96fdcc163a0612306899bfe65ef78f5cc3992c3e

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