Malicious PDF — malware analysis report

Static analysis result for SHA-256 e664cac5ffac0c3d…

MALICIOUS

PDF

82.5 KB Created: 2020-12-25 17:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 26af803dffa43393b9d62ccd2f454b2c SHA-1: 78666dee3971680ec104cae5f53166c7d69147a6 SHA-256: e664cac5ffac0c3d111734e08ec0d9d757b76ab3ea36274f0a2c6af8fa9fc74e
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing attempt. It contains an embedded URI pointing to 'traffset.ru', disguised as a barber appointment booking app. The PDF also contains a large number of external links, many of which are benign, suggesting a link farm or SEO manipulation tactic to obscure the malicious URL. No scripts were extracted, but the presence of external links and the phishing lure strongly suggest the intent to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=barber+appointment+book+app PDF link annotation
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/6350409.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/icMgeCv/priority_wine_pass_reviews.pdfIn PDF document text
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/57735e21.pdfIn PDF document text
    • https://sojugadetoju.weebly.com/uploads/1/3/4/6/134683069/1847973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5faa649aa418a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420752/normal_5fdf1fe526ed9.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/vemifotojufigituk.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/gedimuta/attribution_in_social_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/android_product_store_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/66263807800.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/kaththi_sandai_tamil_movie_free.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_off0001085d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085D 5008 bytes
SHA-256: f6c7246cb47950590396d3b62cba4d64e62169063635e4873b8aedb2da5c3c31
font_01_sfnt_off00011951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11951 10552 bytes
SHA-256: fb0656cf16d82107078c649e2a80173e3c33370d3f70770b9225d2cb255cb44e

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