Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0b44a318e45b58…

MALICIOUS

PDF

78.6 KB Created: 2021-03-15 05:30:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 95b2e7f9a8b008f854bbb841daad7032 SHA-1: 5a676475e5e4e0940257d72fafecc5f2adc84354 SHA-256: 5f0b44a318e45b58982825c2156bdb63429e38c23d40414ba9579cde71d9bf5b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

Heuristics 5

  • 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 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://vilenefex.ru/strik?utm_term=how+to+use+kronos+biometric+time+clock PDF link annotation
    • https://cdn.sqhk.co/parikozug/ii67Lhi/26434881852.pdfIn PDF document text
    • http://tifebozazam.iblogger.org/json_formatter_mac_app.pdfIn PDF document text
    • https://cdn.sqhk.co/buweworipoza/klXghhh/14849414090.pdfIn PDF document text
    • http://memaberenux.scienceontheweb.net/vibevadolukijifiku.pdfIn PDF document text
    • http://topstudy.fun/lord_of_the_flies_study_questions_answerswpmg7.pdfIn PDF document text
    • http://poradoit2.site/bozejatizonekepubonapduis.pdfIn PDF document text
    • http://retamos.mygamesonline.org/3665184634.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/zhfiajf/gudagijopiporuvose.pdfIn PDF document text
    • http://fbdirect.site/gta_5_digital_download_xbox_one_cheapvw3uy.pdfIn PDF document text
    • http://tawaguf.scienceontheweb.net/gluconato_de_calcio_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/fyCakZJ/64081525704.pdfIn PDF document text
    • http://vutisonoj.sportsontheweb.net/google_maps_live_location_not_updating.pdfIn PDF document text
    • http://xajabuzowa.scienceontheweb.net/24841280569.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lemenugedo.epizy.com/vudetegitimab.pdfIn PDF document text
    • http://bopamebedozupux.epizy.com/89812903072.pdfIn PDF document text
    • http://pubitawiwinas.rf.gd/waverley_christian_college_uniform.pdfIn PDF document text
    • http://tajafex.rf.gd/77337788889.pdfIn PDF document text
    • http://wefazor.epizy.com/63054778823.pdfIn PDF document text
    • http://bufifotuxif.rf.gd/walmart_cash_registers_for_sale.pdfIn PDF document text
    • http://zasidolejilu.epizy.com/on_my_way_remix_lagu.pdfIn PDF document text
    • http://vimevuda.rf.gd/78167769603.pdfIn PDF document text
    • http://vogonadebemumox.epizy.com/23715563514.pdfIn PDF document text
    • http://wemopax.rf.gd/49470879913.pdfIn PDF document text
    • http://rodaselawowov.rf.gd/photoshop_free_windows_10.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF515 4992 bytes
SHA-256: 882c8981d08e6c7f290a455467d23752783cdd8ebacd038da1e32e077348b67b
font_01_sfnt_off0001060f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060F 11368 bytes
SHA-256: 2f02050ac2dd3f979be78d65d857d832a261d051902200cda3facb2aafa5fa54

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