Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a49fd3651de730f…

MALICIOUS

PDF

75.9 KB Created: 2021-02-12 01:17:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 34f11ad1121b8bdfd7706e3f88b006b7 SHA-1: 01c15a11162dd08f2dc596f44ab436960a044853 SHA-256: 9a49fd3651de730fbd1552d36e4f35710111e11411cfc736568fc21ea948f583
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://crophysi.ru/123?utm_term=word+with+double+meaning In PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/vkhgXJ8/gadotomeb.pdfIn PDF document text
    • https://futinenapol.weebly.com/uploads/1/3/1/4/131438538/5996515.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/IiiihAg/62609836089.pdfIn PDF document text
    • http://vasazuruxu.iblogger.org/bill_nye_sound_video_worksheet_answers_dumbo.pdfIn PDF document text
    • http://xogubafirugufa.iblogger.org/all_of_me_piano_violin_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/mivufarowiwi/hfjfglR/quiz_3_the_roman_empire_quizlet.pdfIn PDF document text
    • https://cdn.sqhk.co/vojasipi/acnMieu/biwanudekuzanug.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/aAXHPTa/green_farm_3_cheats.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/list_sheets_in_workbook_vba.pdfIn PDF document text
    • http://nakewifowid.rf.gd/87953499533.pdfIn PDF document text
    • http://bezofiwod.rf.gd/5844855621.pdfIn PDF document text
    • http://zunebodiz.epizy.com/mixibabagixusexuzumove.pdfIn PDF document text
    • http://jinujatafariva.rf.gd/49358547636.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/2008_chrysler_sebring_convertible_owners_manual.pdfIn PDF document text
    • http://mideravedikow.rf.gd/nadupinegatelesebosot.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_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 5304 bytes
SHA-256: 8b514e1fa890ee2387f856cd16e163e0edd60b1416f34cd8d5dc163070e56ef4
font_01_sfnt_off0000ff8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8A 10292 bytes
SHA-256: 46f483a0aacd4c08e33c659f461534541077f47f2d91a82a37c029b15d188651