Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7c0eea3431c9b4…

MALICIOUS

PDF

78.3 KB Created: 2021-03-14 11:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1754d256ca67ef4c95708c2e16b3d9f9 SHA-1: 27a7fe4d4b0f88bca42b9d0ca3639f7edc65cf3a SHA-256: ed7c0eea3431c9b4d5ba7ace2b902441925f962dcc678af4bacfed2f8567e52a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing lures that often leverage embedded JavaScript for redirection or exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/strik?utm_term=what+is+database+management+system+definition+pdf PDF link annotation
    • http://fegebekuxew.22web.org/24608081358.pdfIn PDF document text
    • https://tajuboramaze.weebly.com/uploads/1/3/4/5/134591815/a262a493b65b7f.pdfIn PDF document text
    • https://cdn.sqhk.co/mudaxomemut/fihXRgi/vevoso.pdfIn PDF document text
    • https://sefadibewotova.weebly.com/uploads/1/3/4/0/134018483/e8b0378a5519c32.pdfIn PDF document text
    • http://xapozekaxo.iblogger.org/how_to_set_timex_marathon_digital_watch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464303/normal_5febed880c63d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488581/normal_5feea19b5174b.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/YhcGVhf/teaching_strategies_gold_app_for_parents.pdfIn PDF document text
    • https://cdn.sqhk.co/kanedufopuma/iijhghn/degobalewuxilalos.pdfIn PDF document text
    • https://kuribigewisowe.weebly.com/uploads/1/3/4/6/134688213/3787043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_6027a5e225b09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460725/normal_5feb620068b88.pdfIn PDF document text
    • https://wosubazaroden.weebly.com/uploads/1/3/0/8/130813518/leluwuvu-bagadaxowoxaj-befezobik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e63448ed-9728-4ed2-b194-031d2750e332/are_star_trek_books_any_good.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/diperejina.pdfIn PDF document text
    • http://fumidafowinub.epizy.com/boroxuvise.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/52787077259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69329baf-a683-42f8-bf2f-a63db53fa73a/kobubaxukeles.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/buxewusudo.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/24456203200.pdfIn PDF document text
    • http://tudifilik.rf.gd/15261374834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d92ef5-ae45-4f20-85e9-aea4110783e3/tamanetopipusesawape.pdfIn PDF document text
    • http://tejogasev.rf.gd/32186123470.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_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 5584 bytes
SHA-256: 03a3d664a690abd1452c899ebd8548f4dc1c6bca5f1b484bd1e2f49ba04d97f1
font_01_sfnt_off00010819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10819 10296 bytes
SHA-256: 8a97f63633254f720f0daf0a4bfbe9cc06cbf242dc96d4e8856c954195e20eeb

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