Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad12bb9dcb372b22…

MALICIOUS

PDF

64.5 KB Created: 2020-11-20 09:06:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8c157adf4a949daec452a817d2b6640a SHA-1: d747705c1c2078d599f33e4bfaa24ad97d319155 SHA-256: ad12bb9dcb372b22b12ff891c7ca8f4e7c5d2d3ba21c296bad01fa6ea1c006f1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?utm_term=battle+girl+hentai In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380691/normal_5fa1b0143ff6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_5f910099452cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462059/normal_5fb61ad9ae3df.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/lewuli/rasaxepatojenoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01d52895-8d10-450b-8aa1-962b9a943943/baadshaho_movie_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c8026d-3b79-43fd-922b-993f9b4bad52/xogodusagemokikubevomos.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/how_to_reference_ipcc_report_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/tiger_rock_taekwondo_blue_belt_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f747a08e-acc5-4c6c-a9da-18f3fd475b56/76671611424.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/32744431903.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/csun_2020_classes.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/stargate_sg1_rpg.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_off0000c2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E7 4816 bytes
SHA-256: 6bc1939294232f8af21e908b56b89b7bb4b52c1249aef8c34684141df72b493e
font_01_sfnt_off0000d341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD341 10100 bytes
SHA-256: 782778068301ae1ceb5e888967c94f6b608ad93a1981d6a298588a5b9d6e8f05

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