Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c70408c22c2ae9…

MALICIOUS

PDF

82.1 KB Created: 2021-02-25 13:57:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8a0e338016d15da4fb09801233b36f3c SHA-1: a09dd00cdd03baa6be2ded6844dbc6e9044139e0 SHA-256: 49c70408c22c2ae961ae2b4c1a929adc4c7ab06667a1cd14c02749fa237b8be2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/strik?utm_term=log+pub+table+and+chairs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4390071/normal_5ffe529be3008.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/sketchup_pro_2018_license_key_and_authorization_number3na02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481509/normal_5fcf4ca3bc396.pdfIn PDF document text
    • https://gabanifuvumot.weebly.com/uploads/1/3/4/5/134588994/mutefa.pdfIn PDF document text
    • https://bozobazevadetob.weebly.com/uploads/1/3/1/6/131607158/201657ac95.pdfIn PDF document text
    • http://vekogevev.22web.org/kuwaxa.pdfIn PDF document text
    • https://zanasebumafuwaj.weebly.com/uploads/1/3/4/8/134899829/sanalubawum.pdfIn PDF document text
    • http://front-glass.website/free_business_card_template_pptvp2q8.pdfIn PDF document text
    • http://kasyanbeauty.com/2354299058mm0d7.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/the_killing_joke_ending_batgirl.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/sat_reasoning_test_preparation_books.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_601b2cc85092a.pdfIn PDF document text
    • https://rovorakule.weebly.com/uploads/1/3/4/7/134774255/bekoweku.pdfIn PDF document text
    • http://defupezive.iblogger.org/monster_vs_aliens_susan_wedding.pdfIn PDF document text
    • http://tryraisins.pro/babylonian_civilization3hnhd.pdfIn PDF document text
    • https://deremufirig.weebly.com/uploads/1/3/4/8/134854029/5c27b.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/44003602038.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/tajavudesapasepedaga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://metukobitoro.rf.gd/gixewodomonodalutamefu.pdfIn PDF document text
    • http://kalavelixafuro.epizy.com/bewafa_tera_masoom_chehra_song_pagalworld.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/645155920.pdfIn PDF document text
    • http://sojusubelifaf.epizy.com/kenmore_elite_he3_dryer_capacity.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_off0001011a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011A 5416 bytes
SHA-256: 9874c67309d36b92ba13d3a584695f3bac7d3e99ae6c627fec3fc5f74b5be1c4
font_01_sfnt_off00011378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11378 11812 bytes
SHA-256: 1017786694a69212b8a67bd2e8657052dbc8564200262bfdb942e15b2f440509

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