Malicious PDF — malware analysis report

Static analysis result for SHA-256 2794b35556fe5fad…

MALICIOUS

PDF

67.1 KB Created: 2021-03-09 10:32:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f3910f7bbebaa9671944849bebf6b2e3 SHA-1: dd35fca61b6e4185278dc351aa5f17e9c4357ef4 SHA-256: 2794b35556fe5fad7bd19c967ca5b7d56ac2f254cfc0118b09b10224ac26aed4
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.9417

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
  • 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
  • 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://xajibur.ru/strik?utm_term=second+grade+vocabulary+workbook+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501965/normal_5fdffbd8a67e0.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/kulozawe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464873/normal_5ff13cd4ab20a.pdfIn PDF document text
    • http://fevevafo.medianewsonline.com/how_to_clean_burnt_spots_on_glass_top_stove.pdfIn PDF document text
    • https://cdn.sqhk.co/gojinuma/heib2hc/wofezikususojijoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/zevukodixu/hhiKhbU/54014627114.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/jfifU1c/helix_jump_2.pdfIn PDF document text
    • http://jifebaze.iblogger.org/los_numeros_romanos_ejercicios.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/d92ha2q/24389213282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388052/normal_6028f9e49cfb3.pdfIn PDF document text
    • https://cdn.sqhk.co/wamiratena/thjjhif/60235763241.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gatakokuto.rf.gd/vositikubipolonumafigam.pdfIn PDF document text
    • http://goxofokosiz.epizy.com/26096010372.pdfIn PDF document text
    • http://vusomafolu.rf.gd/wave_interference_20._3_worksheet_answers.pdfIn PDF document text
    • http://vevenamefod.epizy.com/cdisc_adam_guidelines.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/68450932517.pdfIn PDF document text
    • http://sabuxixu.epizy.com/catch_me_if_you_can_full_movie_google_drive.pdfIn PDF document text
    • http://falalovoxiwada.epizy.com/megegalitutebagilufi.pdfIn PDF document text
    • http://tubasip.epizy.com/free_trial_version_of_bitdefender_antivirus.pdfIn PDF document text
    • http://taxupot.rf.gd/jolamumawidurog.pdfIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_9a0cf99839294c1da37269781dfeaf5b.pdf?index=trueIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_bca3973d6c6c454aa5c88bdb7835a343.pdf?index=trueIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_5376d42fdc6f496ea8bfb6b11dd434d1.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39A 5704 bytes
SHA-256: c8bd8b775aecadbe3ac6594218c42b862ee9455a02f097fcf638872da1db0378

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