Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f94af6258768af…

MALICIOUS

PDF

81.7 KB Created: 2021-03-09 17:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ba6284a150141bc9ad3fafe8a9dc2b7a SHA-1: 3fc80b67a43ba08642f1193e5834b67960a331c2 SHA-256: 00f94af6258768af05eadd4bb6b6c5dcc893a832bf79f5330714dbb796b8b9a5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, indicating it functions as a link farm designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution, by leveraging a deceptive lure related to search queries.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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=diary+of+a+wimpy+kid+wrecking+ball+ar+test+answers PDF link annotation
    • http://xtreme-sport.ru/directv_packages_and_prices_for_new_customersggcn7.pdfIn PDF document text
    • https://cdn.sqhk.co/pawanipol/fh4jeid/59243309783.pdfIn PDF document text
    • https://vafopizinenited.weebly.com/uploads/1/3/4/4/134480139/784e1036accef0a.pdfIn PDF document text
    • https://cdn.sqhk.co/foxoxaze/ifgccmm/dead_cells_wiki_graveyard.pdfIn PDF document text
    • http://blubadgehelp.net/heads_up_concussion_test_answers3w43o.pdfIn PDF document text
    • http://ital-girl.space/522508935220racx.pdfIn PDF document text
    • https://cdn.sqhk.co/wifuponi/jgiL8b6/lebara_sim_card_not_activating.pdfIn PDF document text
    • https://nebuxegakox.weebly.com/uploads/1/3/4/4/134404726/polutofar-resabajavega-bolapupera.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/1hjb80j/the_flash_cw_channel_directv.pdfIn PDF document text
    • http://gufutaca5.xyz/shalom_aleichem_goldfarb_sheet_music2mkjw.pdfIn PDF document text
    • http://istlan.fun/taotao_scooter_repair_manualeufv2.pdfIn PDF document text
    • https://wulilunize.weebly.com/uploads/1/3/1/0/131071037/8367989.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/98aa570c-6d91-4f59-803c-5ac386d005ae/97547749525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97f91e1a-5f9f-4903-a768-6b5705357319/79029064623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ab3ff2-ac48-41a4-9f81-e64a3c77a5db/joladumifizame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/755cbbd6-b723-4fd3-b58e-9a82de0b3eaf/marubevuxopawituvazagev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/662bf40c-0ccf-4d5e-aba9-9e2d9df18a8a/luzupojufabib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49e8066-1c76-491c-8a6d-2cffa81c2f47/tabexoxifulazigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/612398c1-104a-49ee-8b18-80ce44faaf62/fujasofus.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_off0000fcbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBB 5872 bytes
SHA-256: 1eb010acfe3012cf8e8d169c0497bbcf65beed3188cd2a90c0d1b8312b985392
font_01_sfnt_off000110c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C8 11784 bytes
SHA-256: 3d96313017c36ccf17c271e4af2fdf26402fd0daf5c213451b484e63b879cfbc

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