Malicious PDF — malware analysis report

Static analysis result for SHA-256 74be1668474d8f93…

MALICIOUS

PDF

75.4 KB Created: 2021-02-18 20:58:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3204d7a92fb6cdce26bb0c0934e30d55 SHA-1: 581143fd3fe72a9e4353cf940e88e3a5bd9ad027 SHA-256: 74be1668474d8f938e7bfcfb99be836ad8b411636a97efb3b386fd584de3a3d2
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to search queries, reinforcing the lure tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/wix?keyword=human+skeleton+diagram+with+organs PDF link annotation
    • http://detonic-deutschland.website/gunexesuxumiwsyuit.pdfIn PDF document text
    • https://zuzesewijolane.weebly.com/uploads/1/3/1/4/131406438/7767948.pdfIn PDF document text
    • http://detonic-italy.website/free_website_template_bootstrapvcld5.pdfIn PDF document text
    • http://naderuromopuru.22web.org/quran_arabic_english_dictionary.pdfIn PDF document text
    • http://bonus332.site/retinoblastoma_pediatriabrzyb.pdfIn PDF document text
    • https://zomimodobi.weebly.com/uploads/1/3/0/7/130739583/e02107.pdfIn PDF document text
    • http://b0xberry.online/tulezakulofibiuqj1q.pdfIn PDF document text
    • http://feelslike35.com/9276395839ojpgh.pdfIn PDF document text
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/04862.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/international_human_resource_management_7th_editionwf248.pdfIn PDF document text
    • http://my-credit.info/examen_de_alcanos_alquenos_y_alquinosmn0jv.pdfIn PDF document text
    • https://pevopuxavinedun.weebly.com/uploads/1/3/1/4/131406680/disuloxusewibe.pdfIn PDF document text
    • http://prolac.ru/xaveni5026o.pdfIn PDF document text
    • http://websporizle4.com/bozafefakifowqsm0.pdfIn PDF document text
    • http://betmoy54.com/bootstrap_form_error_message_examplelmv06.pdfIn PDF document text
    • http://koolmaxt.online/25391617394i0f7i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sefogozi.epizy.com/28948039567.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/59928266685.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/sapogadiwonoxolawu.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/52396974898.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/14449566298.pdfIn PDF document text
    • http://duguteterexu.epizy.com/gabelapulivefixigen.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_off0000ec5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5B 5356 bytes
SHA-256: 899c268473f00bf9d2c0bcea0d8c789a5b0cbfe8585b27e005b46e68728be8c7
font_01_sfnt_off0000fe6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6B 9812 bytes
SHA-256: 8ccc3b5003afaae9f076f85df413c795695448977c8d763514a9c9ea70ecb309

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