Malicious PDF — malware analysis report

Static analysis result for SHA-256 8229f040dfbb87f8…

MALICIOUS

PDF

73.6 KB Created: 2021-05-15 21:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c509180be9eb75bbbd03e1e59e9b6eb1 SHA-1: ec76eb07d46583add396f9d7fed850d94d049ef6 SHA-256: 8229f040dfbb87f81c5b267a8c89d40f4d509b73aa6007b3b8c79703711d28b8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary one pointing to 'xezojetit.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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
  • 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://xezojetit.ru/strik?utm_term=technical+drawing+with+engineering+graphics+14th+edition+pdf PDF link annotation
    • https://lirodute.weebly.com/uploads/1/3/1/8/131871659/fa4c2d5c8ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495846/normal_5fc7f6db71baa.pdfIn PDF document text
    • https://toxodapakaxoza.weebly.com/uploads/1/3/4/5/134525452/xivowasujig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_6026424211256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_606c4a3c0abf6.pdfIn PDF document text
    • https://fakilopatezi.weebly.com/uploads/1/3/1/6/131606638/mekilebozinew-mojimepugajatiz-fusalit-nifizilurokovop.pdfIn PDF document text
    • http://pazazilomereli.22web.org/jutajogivi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475196/normal_600740ec5e83b.pdfIn PDF document text
    • https://cdn.sqhk.co/zozevuxe/Zhehgje/adobe_acrobat_dc_pro_2015.pdfIn PDF document text
    • https://sinofokum.weebly.com/uploads/1/3/5/3/135316266/vozop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452599/normal_604aaa8d5c19d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_6041cc231c15c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458132/normal_5fd060391cfeb.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/9398192.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/0EWifjd/xirefeliguwewujadilunere.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482870/normal_606312ed56ee8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376371/normal_5fec520ee6022.pdfIn PDF document text
    • https://cdn.sqhk.co/zusisoko/iJBUjie/munulunitesitewujedi.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/tometubufimopim/binance_official_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/copy_of_the_gettysburg_address.pdfIn PDF document text
    • http://temexewike.rf.gd/67048800269.pdfIn PDF document text
    • http://basukek.rf.gd/ayatul_kursi_in_urdu.pdfIn PDF document text
    • http://tinasixubu.epizy.com/22874843682.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/jepuxipu.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_off0000dfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEB 5596 bytes
SHA-256: 623f3a70eae17163006b474bf21e5904f242800a01f3ad6f2d1f3ac8b00a62e7
font_01_sfnt_off0000f30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30C 11020 bytes
SHA-256: 65798e6a3387c444ae8dd8c7009d54cab1bc9e563babe2360f54dd91160810fe

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