Malicious PDF — malware analysis report

Static analysis result for SHA-256 e83ba66838e87000…

MALICIOUS

PDF

71.2 KB Created: 2021-03-24 09:14:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1d918ca46441050d5bfffd89f2029011 SHA-1: 51d6b9c65cc9f64e2e57c58c01bbd2911f9c44e2 SHA-256: e83ba66838e87000534012f43ab93e3876f5e52f5efa8cfd40e4a2e720ae1f5c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/strik?utm_term=star+trek+pocket+books+2021 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369933/normal_603e61a74cab6.pdfIn PDF document text
    • http://changepass.online/los_tres_jovenes_hebreosiocrv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451375/normal_602d7cb12efe8.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/ljjhahh/jordan_11_snakeskin_grey_release_date.pdfIn PDF document text
    • http://creditreportusa.info/ramomevigefiziv3df64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457561/normal_6022e72913379.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367644/normal_5fec8b95ec148.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/jadanenerorobezopomekuded.pdfIn PDF document text
    • http://akvatehnika74.ru/change_din_kambi_new_song_videoofb53.pdfIn PDF document text
    • http://dabopoxele.getenjoyment.net/93502360892.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/2Zji6fh/77490215102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464730/normal_602125e0b47ec.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/hdhfj5D/26440077450.pdfIn PDF document text
    • http://dkblogin-de.best/how_to_replace_a_dishwasher_door_springgudca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_602824df24e8b.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/sajobuparulipupefipapelux9rlc.pdfIn PDF document text
    • http://puninavubexopis.22web.org/professional_capabilities_framework_for_social_workers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/minecraft_bestiary_book.pdfIn PDF document text
    • http://kuwitabetegipo.myartsonline.com/padojo.pdfIn PDF document text
    • http://fetekovabu.onlinewebshop.net/mepeboxeluk.pdfIn PDF document text
    • http://ludatijodibop.rf.gd/optimize_bittorrent_speed.pdfIn PDF document text
    • http://guxasimedoki.epizy.com/zosukagoziletutaraxu.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_off0000d667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD667 5528 bytes
SHA-256: 35fefaaa114cef8624a9ca3c69504badf57a12468ec87273db0c82e9c60cd737
font_01_sfnt_off0000e93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93E 10696 bytes
SHA-256: 158ef498c92505aaf8f0dd0e2ed3ba68c7a18144c407d4b8236fbd903f5e29c3

Open this report in the interactive analyzer, or submit your own file for analysis.