Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9959b0de81418c8…

MALICIOUS

PDF

80.1 KB Created: 2020-12-27 18:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 06edcc753a0ab093b134179a14c8b5f8 SHA-1: 2bfe9b92e6a4b7ea77a55b59e2070839346a0fdd SHA-256: d9959b0de81418c84eea5548d3e44b5f44032146717f38646ffc7a7997f52e5c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a large number of external links, including one to 'traffnew.ru', suggests a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards an attempt to redirect users to malicious content.

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
  • 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://traffnew.ru/123?utm_term=sailor+moon+artemis+birthday PDF link annotation
    • https://cdn.sqhk.co/gemadaruvow/chfhfie/ps_remote_play_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bugabowozi/hfhjHGu/53603788571.pdfIn PDF document text
    • https://puvujoda.weebly.com/uploads/1/3/4/3/134326666/747d66.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/jjBFezO/fixuviminaxusaguv.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/kedelowozaxum.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/bf81c3f6-40c8-4aad-9750-9d25e9959c34/comparing_functions_worksheet_algebra_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a0a158-2353-4d4b-8715-3b0f9726a199/dofipaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f4b8ab-b751-4bab-b599-0778bb40cd55/yamamoto_bankai_release.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a61001d-940b-4ad8-8fdc-c4e703ebaf66/gananumugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d43bd2-72e2-4fa9-9efa-498f5ebe6027/91844373543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb973040-d82b-4007-ab4d-78386085854c/fabozzi_bonds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1597f9fb-2424-4bcf-90bc-8a17d0042f98/fabrication_book.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_off0000f285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF285 2940 bytes
SHA-256: 72b815926571ed76dcdb15ba0f925f8be737f518649be50e3ea36e0fc125b231
font_01_sfnt_off0000fd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD11 5408 bytes
SHA-256: a4c855259684e32c79ce918e4005f671539c3ed09e9c60392dbda237be389c8c
font_02_sfnt_off00010f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F44 10540 bytes
SHA-256: 4f0f4bfc26c543fff3bd694018daa9c33246692f3d9491b1b744b64864aa7977

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