Malicious PDF — malware analysis report

Static analysis result for SHA-256 17173f33fe1334ed…

MALICIOUS

PDF

69.4 KB Created: 2020-11-25 02:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 400e5a9946f5f2e9ca7cef0a30c60d88 SHA-1: 17e65fc7afd6bbf83a2a38ae057c3fd6662fc035 SHA-256: 17173f33fe1334ed33afa8f119f66bff4fb190b6716ffccf843565df974084fc
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting an attempt to redirect users to potentially harmful websites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/strik?utm_term=gold+rush+nugget+bucket+instagram
    • https://bakovumosu.weebly.com/uploads/1/3/4/6/134679162/dadukil.pdf
    • https://cdn-cms.f-static.net/uploads/4409628/normal_5fa36410ac8d5.pdf
    • https://cdn-cms.f-static.net/uploads/4377908/normal_5fb5ed7521c0d.pdf
    • https://cdn-cms.f-static.net/uploads/4409623/normal_5fbd79c58f51a.pdf
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/taxanidasuzepa_jotedi.pdf
    • https://fobijolosa.weebly.com/uploads/1/3/4/7/134730704/gasuzawoz.pdf
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f93f91bb1e61.pdf
    • https://gunewobeje.weebly.com/uploads/1/3/4/1/134109175/88d7c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/598e3a65-7f37-49f3-983f-229e9acba664/juruvawakakotur.pdf
    • https://uploads.strikinglycdn.com/files/0aa7ad64-a492-4481-aaae-72f5352e1d7c/93105934873.pdf
    • https://s3.amazonaws.com/henghuili-files/kakafeka.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_off0000ce69.bin
11e3de51eb07cdb49e45df8b729a557953d9090394294768db395c1b844f9ecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE69 5588 bytes
font_01_sfnt_off0000e141.bin
c07e1d227d57cc11c6352eab48632b0e80b9086b9eaa16db22467b8153d7e98f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE141 11456 bytes

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