Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9315b443c72818a…

MALICIOUS

PDF

76.9 KB Created: 2021-01-11 07:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 11f72ec429691ca9ca14441f4e2213ea SHA-1: 949951b940ea29ce383b172c5cc4235a5730d461 SHA-256: f9315b443c72818a31a0e85bfaa751895aa10df494242f850fadb349166206c5
194 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector, specifically designed for phishing lures. The embedded URL, 'https://traffine.ru/aws?utm_term=access+2007+report+sum+calculated+field', is flagged as malicious and part of a redirector chain. The ML classifier and ClamAV detection strongly support its malicious nature, likely serving as a phishing document to compromise users.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffine.ru/aws?utm_term=access+2007+report+sum+calculated+field In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392656/normal_5faa714db04e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451375/normal_5feb9977990a1.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/jjrQ5hO/50572312096.pdfIn PDF document text
    • https://cdn.sqhk.co/nawafoxobok/zijgcij/dota_underlords_guide_2020.pdfIn PDF document text
    • https://mapawoxerefer.weebly.com/uploads/1/3/4/7/134703144/zepunap_zigetikogelefo_tebevix_josem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465938/normal_5fcce9663020f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384472/normal_5fca7669b6a63.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/zupenafud/magic_johnson_foundation_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/arcade_fire_everything_now_album.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/brownie_camera_value.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_off0000ee66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE66 5644 bytes
SHA-256: c6ad7603718bfcfb355e8f7b8da28a39b8162ddd2b1933f322ad607fb47cacf6
font_01_sfnt_off0001018b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018B 10876 bytes
SHA-256: 1a99bd3683ba323038923b0fbda8250e248ae4f092101619d4544e614b847902