Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ee76b381a52370…

MALICIOUS

PDF

60.0 KB Created: 2020-11-21 02:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa3c67abff84d3b2b1d362e87ffb71f5 SHA-1: 19e3bcada69db294989b8c0ea05ee4e3d03a5d86 SHA-256: 98ee76b381a523708b5d00182501a63619b21097a57ae17d3067fda4b82e623b
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the primary purpose is to lure users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure itself facilitates the embedding of these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=mission+style+end+tables+oak
    • https://xakexoxos.weebly.com/uploads/1/3/4/3/134307698/dd275d9.pdf
    • https://pibofarijefi.weebly.com/uploads/1/3/4/6/134648305/8bee7.pdf
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/jilusepevo_dugevudox_vunisaxegofa.pdf
    • https://bomexufimewaw.weebly.com/uploads/1/3/4/5/134517434/5717907.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cc458f64-f188-417b-982f-41de5b4866df/59797325833.pdf
    • https://s3.amazonaws.com/susopuzupure/bavapub.pdf
    • https://uploads.strikinglycdn.com/files/202e92db-aefe-4025-bbc3-e30a2ebaefc1/78532814027.pdf
    • https://s3.amazonaws.com/zolerazowubow/49870929006.pdf
    • https://uploads.strikinglycdn.com/files/49db1c6e-57e0-493c-8eac-e2295349392b/gabriel_s_sub_shop_orlando.pdf
    • https://s3.amazonaws.com/sugaguxagu/trane_centrifugal_chiller.pdf
    • https://uploads.strikinglycdn.com/files/f9de1805-097b-48c5-86bf-b5dd9b747abe/14942474891.pdf
    • https://s3.amazonaws.com/wibedubosateg/physical_science_grade_11_caps_textbook.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_off0000ad28.bin
6f920d0d7b557245cc55588bca49b8fddeff244f02f4b69018ca4c2bba9e6381
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD28 5032 bytes
font_01_sfnt_off0000be6b.bin
07f0c9d2beb55dd7bb64e460105c8f065b19841697270d123b5ca145da651033
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6B 11004 bytes