Malicious PDF — malware analysis report

Static analysis result for SHA-256 0812478c227fa3f1…

MALICIOUS

PDF

69.5 KB Created: 2021-04-20 23:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2f99c974529777135b389d32f3722658 SHA-1: 25444fc20b5b8c9c20479b890544f1c9327d9c05 SHA-256: 0812478c227fa3f15eb30be5e21af6aceb63924e157bedd6dce3e232502cbe36
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/strik?utm_term=troy+bilt+21+self+propelled+mower+manual PDF link annotation
    • https://teraxumafelenug.weebly.com/uploads/1/3/4/7/134747654/wixum_jutanebag.pdfIn PDF document text
    • https://sizamuvexiluti.weebly.com/uploads/1/3/4/6/134644091/zuxin-taribulo-dasilavivolujuz.pdfIn PDF document text
    • https://rakomuditopag.weebly.com/uploads/1/3/4/7/134717505/gelumotezofexovom.pdfIn PDF document text
    • https://loxufezikuwudi.weebly.com/uploads/1/3/4/6/134687227/8022674.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/8BBFid6/colors_that_go_with_red_white_and_blue.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/analytical_research_methodology.pdfIn PDF document text
    • https://sivabukejiwija.weebly.com/uploads/1/3/4/4/134459056/8f0967.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/da5892.pdfIn PDF document text
    • http://felagem.getenjoyment.net/twilight_saga_new_moon_full_movie_download_in_hindi_dubbed_480p.pdfIn PDF document text
    • https://cdn.sqhk.co/xosujopi/idWZZ1A/amazed_by_you_movie_cast.pdfIn PDF document text
    • http://tozaworewinox.mywebcommunity.org/19084862960.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/cmjaUgj/57348542854.pdfIn PDF document text
    • https://cdn.sqhk.co/gotofebelu/gfghcaK/battle_balls_royale.pdfIn PDF document text
    • http://bivaxopepukoxi.getenjoyment.net/37894929256.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/24797523615.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/wozig.pdfIn PDF document text
    • http://wopudidadufi.22web.org/the_left_hand_of_darkness.pdfIn PDF document text
    • http://xajabuzowa.scienceontheweb.net/leucipo_de_mileto.pdfIn PDF document text
    • https://rimemukevip.weebly.com/uploads/1/3/4/3/134318995/e9e1670a7f0b3.pdfIn PDF document text
    • https://cdn.sqhk.co/guzoladip/jhnidSD/myrkur_mareridt_vinyl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gedoweloxub.rf.gd/beden_dili_yukle.pdfIn PDF document text
    • http://xedovafimolodem.epizy.com/27811649293.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_off0000d0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B5 5652 bytes
SHA-256: b4f44fc68c58e8b57a958a806196f898d8a0799d1a153d1bb5ec20218a89085f
font_01_sfnt_off0000e3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F2 10840 bytes
SHA-256: eda74800ea7401c23966befe59d5c6da211963046242cdf4a59fa2ca8956a0b8

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