Malicious PDF — malware analysis report

Static analysis result for SHA-256 a959f2a83afc4675…

MALICIOUS

PDF

76.7 KB Created: 2021-01-04 17:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 76992e07c9a5c8f9130f8088bcb6e77a SHA-1: b8685417aa8ad1bc0e2099410d45c604e36fa211 SHA-256: a959f2a83afc46751fc9c0050b8c4bd18f46e400c9971d5ae48ddc54f1ffe6ca
214 Risk Score

Malware Insights

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

This PDF file contains multiple embedded URLs, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM, indicating it's part of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV also flagged this file as malicious. The primary attack pattern involves redirecting users to potentially harmful external content.

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
  • 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://ggtraff.ru/aws?utm_term=instantaneous+velocity+and+acceleration+worksheet In PDF document text
    • https://kumusexowefas.weebly.com/uploads/1/3/2/7/132741352/9714410.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/5e9031dbec0ebdd.pdfIn PDF document text
    • https://menaxogem.weebly.com/uploads/1/3/4/4/134432074/1789971.pdfIn PDF document text
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/tupajiwax.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/rebesudanolo/47565574670.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/56817826840.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/memes_in_animal_jam_play_wild.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/call_of_duty_mobile_games_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faaee345-74b4-40d7-a207-42e45575c7a7/vulugodinotenojutepilewel.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/national_lottery_scan_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91ea944-94e8-48ea-a1b0-3f61a0166689/spider_solitaire_games_247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04afccb3-cd99-4b76-be83-e8376bdbf18e/justin_bieber_yahoo_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c6607ce-a430-43a3-9f31-ec541dd2f396/33238452649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f42e6d02-7678-4f44-9cde-5dfac9c8fcc5/kunenemixekivobejadumolux.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_off0000e69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69C 5280 bytes
SHA-256: 3ea75f589b6b03f9a407a99a9931e24a383d7c2780136ccb59cdf19f123e4df8
font_01_sfnt_off0000f8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A3 16204 bytes
SHA-256: a55882a92cd252ec67e65b945cba37b15e2fd9c20f188d1d6be2c7e319d3a093

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