Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62ca16490350ec2…

MALICIOUS

PDF

77.7 KB Created: 2021-04-01 15:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb2003b936f9c4a204d6aaf17eedbea4 SHA-1: b6fb2e70ebae28b74f6a5014de51ae662210d87c SHA-256: a62ca16490350ec295088e5f6fa98c7e81aee123fa466420163832f1bac125ba
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable hosting services, a common tactic for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect the user to potentially malicious content, likely a phishing page or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5487

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://mezovuduw.ru/award?keyword=accord+adjectif+de+couleur+pdf
    • https://gemuvubakada.weebly.com/uploads/1/3/4/4/134494784/8c83fcbdc5.pdf
    • https://cdn-cms.f-static.net/uploads/4496586/normal_60183f834f396.pdf
    • https://ropidofizo.weebly.com/uploads/1/3/0/7/130738616/641e8aeb50773.pdf
    • https://cdn-cms.f-static.net/uploads/4453885/normal_6060e32a796e6.pdf
    • http://pimumuze.22web.org/93019557829.pdf
    • http://namivuwefixixow.22web.org/badawi_book.pdf
    • https://dazuzoboda.weebly.com/uploads/1/3/4/0/134017564/jaloj-kalavomefitode-turojilize-dazomiralovexu.pdf
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/2859672.pdf
    • http://nevezewikuzi.iblogger.org/12165112153.pdf
    • https://wilibuluso.weebly.com/uploads/1/3/6/0/136086636/wotobakul.pdf
    • http://narezekopalezi.iblogger.org/kapizadifo.pdf
    • https://cdn-cms.f-static.net/uploads/4383794/normal_602216799ad44.pdf
    • https://binigikuvoloxog.weebly.com/uploads/1/3/5/3/135332024/jibipunitebefogi.pdf
    • http://tamogulaganero.scienceontheweb.net/general_chemistry_quiz_questions_and_answers.pdf
    • http://pikejofopon.mypressonline.com/ccna_1_lab_manual.pdf
    • http://febiterozoz.medianewsonline.com/63234869661.pdf
    • https://mefovisesivem.weebly.com/uploads/1/3/4/5/134525463/d5a58294a.pdf
    • http://vopipiji.iblogger.org/hemoglobin_check_app.pdf
    • https://cdn-cms.f-static.net/uploads/4484635/normal_605f0ba07d96d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://popeladidet.epizy.com/jigakotajefirerowitove.pdf
    • http://todojenosefotaz.epizy.com/vaxuvigutuxexowoxegogi.pdf
    • http://kakavogulogij.onlinewebshop.net/88062615704.pdf
    • http://mutuwosamitev.rf.gd/dabota.pdf
    • http://wolobugoxew.myartsonline.com/computer_network_architect_employment_trends.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102db.bin
22f0b7f2304230e76a38503284322c3d1eb6444c795d96cd54575720bb082057
pdf-font-stream PDF embedded font (sfnt) at offset 0x102DB 5036 bytes
font_01_sfnt_off0001140f.bin
7f75ad570fde1cfe7e0bb9fcd22474b757f8f19828890a3063452e16cb258510
pdf-font-stream PDF embedded font (sfnt) at offset 0x1140F 1680 bytes