Malicious PDF — malware analysis report

Static analysis result for SHA-256 2094a28d1f13fe10…

MALICIOUS

PDF

76.6 KB Created: 2021-02-28 19:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4b4f799acce399d6559d9e186bcf2e16 SHA-1: db316ac9a2be82d56bb4851bbbc6979af9357a2a SHA-256: 2094a28d1f13fe10d49f2f45fecf27b75fb94518fb4ffe196e469c113259bd53
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document's content, while heavily obfuscated, appears to be a lure related to educational materials. The presence of multiple external URIs and a high ML classifier score indicate malicious intent, likely to phish or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=the+7+habits+of+highly+effective+college+students+2nd+edition+pdf PDF link annotation
    • https://sewusadata.weebly.com/uploads/1/3/5/4/135401056/wiwer_jomatufujupul_vabujanowakipu.pdfIn PDF document text
    • https://dajoromu.weebly.com/uploads/1/3/4/3/134309711/795010.pdfIn PDF document text
    • http://citrus-fruit.space/matplotlib_cheat_sheetqef3a.pdfIn PDF document text
    • https://bubunixijasebed.weebly.com/uploads/1/3/1/4/131407035/fokemodejawawas-wixeseti-bovagolom.pdfIn PDF document text
    • https://sizadomuwegemos.weebly.com/uploads/1/3/5/3/135335556/gepanesej-jupupem-wevobakig.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/e91jg9t/alive_in_shelter_walkthrough.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476577/normal_60047a561e23a.pdfIn PDF document text
    • https://cdn.sqhk.co/nimawabej/cFijIhb/kpop_stores_hiring_near_me.pdfIn PDF document text
    • http://gsmall.space/the_constitution_vocabulary_builder_section_2_answer_keyblw8p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380223/normal_5feb76bae2b92.pdfIn PDF document text
    • http://socialwave.me/whatsapp_web_apk_softonicti2lg.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/nZ7ibkN/60180875572.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/bd5112875.pdfIn PDF document text
    • https://cdn.sqhk.co/wumidimux/hjdPQLi/albacete_inox_knife_price.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_5fd67899b8e87.pdfIn PDF document text
    • https://tunorikiwevog.weebly.com/uploads/1/3/4/0/134097136/2430731.pdfIn PDF document text
    • http://cparta.moscow/wukatimopedinisalazaxijrlpu1.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/wgchdyp/xasofaziwarog.pdfIn PDF document text
    • https://cdn.sqhk.co/gozafavapawu/vhf4yjh/60564341597.pdfIn PDF document text
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/3874b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ecab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAB 5784 bytes
SHA-256: f0ecf422d6db083ddc87cf06c9d8a152ea2a42da9e9b7c9f70b158c1057c69a1
font_01_sfnt_off00010071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10071 10728 bytes
SHA-256: 1b864a9a9a7035e1f818921a212b05800af96e4780b6d3d611e3fbe2ab298ce7

Open this report in the interactive analyzer, or submit your own file for analysis.