Malicious PDF — malware analysis report

Static analysis result for SHA-256 344ab4c72acaf39b…

MALICIOUS

PDF

90.8 KB Created: 2021-04-05 20:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9f318ef103c523c93e90a62c68315c24 SHA-1: dc2be3a7e7b6b2c6a77d98adcf811637c31a7d3e SHA-256: 344ab4c72acaf39bca6d11852805711174ca72c0e40f51e9779ca93156a6ff06
126 Risk Score

Malware Insights

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

The PDF document contains numerous links to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://jumiwimov.ru/strik?utm_term=washing+machine+repair+near+me+no+callout+charge', suggest a lure related to repair services to entice users to click through to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=washing+machine+repair+near+me+no+callout+charge PDF link annotation
    • http://kaxiwemusemoj.mypressonline.com/33116328105.pdfIn PDF document text
    • http://swiss-gear-top.xyz/cooks_waffle_maker_rebateec29y.pdfIn PDF document text
    • http://lumacy.site/sojoborowenumogefogavaga8yf5t.pdfIn PDF document text
    • http://waduresiwiboba.iblogger.org/17801504681.pdfIn PDF document text
    • http://vejuwagor.iblogger.org/amoretti_sonnet_79.pdfIn PDF document text
    • http://crubr.space/43750703838ylgc0.pdfIn PDF document text
    • https://gununoneku.weebly.com/uploads/1/3/4/3/134309052/c8492f2c9adf92c.pdfIn PDF document text
    • http://gafegenuwegapok.iblogger.org/55543312724.pdfIn PDF document text
    • http://gagogepatajebe.medianewsonline.com/livotelenelimuz.pdfIn PDF document text
    • http://lokusenikuxole.iblogger.org/vbspu_exam_date_2020.pdfIn PDF document text
    • http://4bochki.ru/how_to_clean_samsung_washing_machine_filter_front_loaderck2kq.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/94949226117.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/89856046632.pdfIn PDF document text
    • https://pakumage.weebly.com/uploads/1/3/4/8/134890232/tirigadumipewe.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/xedasugalojunigavilagi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabenejajoko.myartsonline.com/history_of_indian_art_book_class_12_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/654d5634-0996-4c46-b32b-3b7823536387/does_xbox_360_have_wireless_controller.pdfIn PDF document text
    • http://gamelaluwer.myartsonline.com/kalabhairava_ashtakam_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3886ffbd-b5e6-42b5-8ecc-317f19d066a4/solving_quadratic_equations_by_graphing_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b8b391-c8bf-461f-8036-4f2011033c88/how_much_does_an_anatomy_professor_make.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_off000126d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D4 5360 bytes
SHA-256: 761a565ca9159a239841aa4f04b8ceadb47d45a2aba794d793238922a7742bfa
font_01_sfnt_off000138f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F6 10772 bytes
SHA-256: e1b218b7efa389a4ab3be06f0020158a60e61538ad3efd72e432e265015125ae

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