Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a330bd6c12eb81…

MALICIOUS

PDF

73.3 KB Created: 2021-03-09 02:28:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 67fd27866651c9008f0498343c54d8b7 SHA-1: 1381f676d77743c61b37350cc10b222e6746c26d SHA-256: 07a330bd6c12eb8160c5ec6f3ea39b3682555fa2c49fd63994a027bbfbada2a1
186 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/strik?utm_term=meal+plan+options+tamu PDF link annotation
    • http://liketime.fun/equalizer_hitch_parts_canada7lket.pdfIn PDF document text
    • http://aydym.club/62596856020d6n9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452389/normal_600b461862d7c.pdfIn PDF document text
    • https://rirejanumaxix.weebly.com/uploads/1/3/4/6/134631236/4855047.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369923/normal_5fff27944f6dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480880/normal_5fd2a7673c33c.pdfIn PDF document text
    • https://robiduvasolowa.weebly.com/uploads/1/3/4/6/134657162/4403712.pdfIn PDF document text
    • http://dkmz1.club/27557161557mjza8.pdfIn PDF document text
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/8537897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486742/normal_603cbd81c21e3.pdfIn PDF document text
    • https://zamovolipizutuj.weebly.com/uploads/1/3/1/0/131070940/3711546.pdfIn PDF document text
    • https://xodumusekow.weebly.com/uploads/1/3/4/7/134708755/9062982.pdfIn PDF document text
    • http://chaptejvxz.fun/mini_dvi_to_vga_best_buyyu2v1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503692/normal_6035275717898.pdfIn PDF document text
    • https://kimiligemapi.weebly.com/uploads/1/3/4/3/134343210/8939914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_604186473491b.pdfIn PDF document text
    • http://vwwv-avito.online/biometria_hematica_interpretacionj2sgf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486037/normal_600e92513bc2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27C 4872 bytes
SHA-256: 830d7c65d9eeaf73e90b2e8f0fe02d9aa2221a43797cbb1b14f324799d3e1042
font_01_sfnt_off0000f30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30A 10516 bytes
SHA-256: 345542bd746732f8528e284d7c82b6f8d7001a3ff2ed3b34b0632cf4539b61d1

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