Malicious PDF — malware analysis report

Static analysis result for SHA-256 0596024b2adc0b54…

MALICIOUS

PDF

87.8 KB Created: 2021-03-08 14:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2d0efe71797971c906877a61e08b6041 SHA-1: 88d3379d8f8d2db6a0cfc3d3d9e582dbc02a2b50 SHA-256: 0596024b2adc0b5425c283f93c2a05149339a884c1b794eb4b3865856f130306
186 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains a significant number of external links, suggesting a link farm or phishing attempt. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic points to disposable hosting, reinforcing the malicious intent. No scripts were extracted, but the structure suggests it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=dragon+quest+strategy+guide PDF link annotation
    • https://cdn.sqhk.co/zubuwebofe/h67Dkjb/lomulumuje.pdfIn PDF document text
    • https://cdn.sqhk.co/posaleren/mDsjjDQ/fly_wings_mod_apk_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409122/normal_5fe136f0b091f.pdfIn PDF document text
    • https://cdn.sqhk.co/bikugipozamu/gfuGOrc/7201006509.pdfIn PDF document text
    • http://gagogepatajebe.medianewsonline.com/50_shades_of_grey_book_series_download.pdfIn PDF document text
    • http://momentshop.website/134488196311nnai.pdfIn PDF document text
    • http://terakusinuw.mypressonline.com/88916512091.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/gegc3ig/youtube_sound_equalizer_online.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/motorola_surfboard_extreme_sbg6580_firmware_update.pdfIn PDF document text
    • http://pe50off.info/631722465911inr6.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/ia1jcEF/dragon_lords_yugioh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470681/normal_602360f633322.pdfIn PDF document text
    • http://apkweb.net/lujikofefewufgxm79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muwiliwus.epizy.com/wordly_wise_book_7_lesson_15.pdfIn PDF document text
    • http://gobaligene.epizy.com/baofeng_bf-_888s_software.pdfIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_9eaa3376420549618cef8cd52eb5594a.pdf?index=trueIn PDF document text
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_16e30abf76924ba382857bec8059f382.pdf?index=trueIn PDF document text
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_f6e9d4bc97c84c5aa8ae0732e8238cdb.pdf?index=trueIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_41e9c29089a2420ea83f0bea27631f65.pdf?index=trueIn PDF document text
    • http://waxodomopupu.epizy.com/2020_sexiest_man_alive_nominees.pdfIn PDF document text
    • http://sajavisazoz.epizy.com/antenna_theory_wiley.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_b85cd140e6f0408da2e24dc27ef79a9c.pdf?index=trueIn PDF document text
    • http://padusij.onlinewebshop.net/lidexesixapekodirolorefol.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_off00011c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5C 5188 bytes
SHA-256: de9cd41ed6dd833ff381c2f26dfef050933bb1fc47c2ad50363e02f98090353b
font_01_sfnt_off00012e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E14 10592 bytes
SHA-256: 8c54ae48f552656df3aa274d00a7fbe77800c80c47963cb81b0ab9ae1f37c958