Malicious PDF — malware analysis report

Static analysis result for SHA-256 950507308f981679…

MALICIOUS

PDF

110.5 KB Created: 2021-03-09 04:32:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cd723bb25ea7189d1cb96219393afb8f SHA-1: 4f628dc51c541b39b484499032ce6660aac9e423 SHA-256: 950507308f981679164a3429339d9f0a9feb3a038189f9042a7eca466dd6aee0
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body and embedded URLs suggest a phishing or scam attempt, directing users to external websites under the guise of providing search results for specific book titles. The presence of numerous external links, many on disposable hosting, further supports this assessment.

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://xajibur.ru/award?keyword=auguste+comte+books+pdf PDF link annotation
    • http://brumbum3.xyz/92833845807m2k65.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/2nd_grade_book_club_worksheets.pdfIn PDF document text
    • http://newyearshop.site/defulagupidetapipunemivumc2zi2.pdfIn PDF document text
    • http://werenntaq.online/66427150711fbpu.pdfIn PDF document text
    • http://zumubexupon.22web.org/powozo.pdfIn PDF document text
    • http://7lessons.website/dell_1320c_printer_tonerr9782.pdfIn PDF document text
    • http://shopyou.online/devi_bhagwat_puran_in_sanskrit_with_hindi_translationp3cb8.pdfIn PDF document text
    • http://teaitalis.space/nujidohbnzm.pdfIn PDF document text
    • http://teachost.com/how_to_lose_weight_with_arbonne_shakeszkbzv.pdfIn PDF document text
    • http://shopeuro.pro/93979344310pfeuw.pdfIn PDF document text
    • http://wumijodurixemi.22web.org/jubewepeda.pdfIn PDF document text
    • https://rajizoru.weebly.com/uploads/1/3/1/8/131856770/8ff497a3df34f5.pdfIn PDF document text
    • http://laserisesiseno.getenjoyment.net/hurt_feelings_report_da_form.pdfIn PDF document text
    • http://getplafond.xyz/25284606451qkza4.pdfIn PDF document text
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/wutesiboxolure.pdfIn PDF document text
    • http://vatemuredaxusob.22web.org/aditya_hrudayam_stotram_in_malayalam.pdfIn PDF document text
    • http://luminar3-download.xyz/67354004295qh3c8.pdfIn PDF document text
    • https://xexonuza.weebly.com/uploads/1/3/4/3/134305788/6ba71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ledafavegarawam.rf.gd/car_air_conditioning_pipe_repair_kit.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/kopujomapoza.pdfIn PDF document text
    • http://wedosop.rf.gd/standard_code_of_parliamentary_procedure.pdfIn PDF document text
    • http://butaxogusevi.epizy.com/yahoo_fantasy_football_cheat_sheet_auction.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000168f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168F0 5060 bytes
SHA-256: f73aec37348b603dc4b3ebb26ea8daf1973be815ef2ad753c8d2f8d44fd7a6cd
font_01_sfnt_off00017a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A30 10792 bytes
SHA-256: 12684d769f0b4b2adaf39a1f2808c236b2255809669b5e5215e62d16e11465dd
font_02_sfnt_off00019e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E53 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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