Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eeae3009b7a4db7…

MALICIOUS

PDF

111.7 KB Created: 2021-04-11 16:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d99eed5f1a75eddc7fda0b959ec23f4f SHA-1: e1d99426f99973ec0e8518a323544a4140176610 SHA-256: 1eeae3009b7a4db7da8ab33ab6fd10c4b7038413354ed525f8ae7c1d747d5b6e
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to disposable domains or services like Weebly and Strikingly, suggesting an attempt to distribute malicious content or engage in phishing. The presence of external URIs and the PDF_SEO_LINK_FARM heuristic indicate a likely intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=how+to+eat+fried+worms+ar+level PDF link annotation
    • https://cdn.sqhk.co/sagitusat/JCgfhhd/notutirewejofalixiwalaxop.pdfIn PDF document text
    • https://tujobofawoti.weebly.com/uploads/1/3/2/6/132695409/pijiwozipaxage-bulokobeguvu.pdfIn PDF document text
    • https://kawavugin.weebly.com/uploads/1/3/0/8/130874435/rinejuxesofigo_piwokuvufelugax_levusiv.pdfIn PDF document text
    • https://vigodozoxofi.weebly.com/uploads/1/3/4/5/134599787/7913566.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/hCQiPe4/download_game_stickman_dismount_2_mod_apk.pdfIn PDF document text
    • https://nogiwesetegi.weebly.com/uploads/1/3/1/6/131637024/7da85207b0dca.pdfIn PDF document text
    • https://cdn.sqhk.co/jibezilesu/crciceB/13624202977.pdfIn PDF document text
    • https://lakerevuko.weebly.com/uploads/1/3/4/6/134654656/naraleziduwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495413/normal_5fd3c9638e9bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471479/normal_5ff7f21797168.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370071/normal_6002d5ff9e421.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/b4Yifhc/wise_eyes_dubois_pa.pdfIn PDF document text
    • https://cdn.sqhk.co/japuwejede/jjgcMEO/tavuvew.pdfIn PDF document text
    • http://zutilituvinif.22web.org/39083831058.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_2082c3135e8841b3adac16a791b8527b.pdf?index=trueIn PDF document text
    • http://jaraduvexuzufe.epizy.com/what_is_process_innovation_in_generating_project_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65455d38-ee72-4a66-bef8-16eaef997ad1/71868668808.pdfIn PDF document text
    • http://rejeremonuwiz.rf.gd/galupuxeximoxowewaz.pdfIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_9a341cc9c75b4541b38d33f55eb103d1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/702215a0-e66f-4fae-9f3b-49c299180dae/best_rocket_stove_diy_plans.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_off00016e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E9B 4848 bytes
SHA-256: b8e393c4749cf9f03b354961c2d35153911dfb8b1b84a10e9caed81a2f2326a4
font_01_sfnt_off00017f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F2B 10692 bytes
SHA-256: 4479fd1c6985d0dfcfd800e2ea878c928b832a98345573f6085114c1725e9fbb
font_02_sfnt_off0001a300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A300 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e