Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db9dd60194d2e5a…

MALICIOUS

PDF

67.6 KB Created: 2021-03-08 18:21:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 73884228cb36efbd91ea3490f961eec5 SHA-1: 49dc7c29639adec5a44bab6e6e81e468a2cde833 SHA-256: 4db9dd60194d2e5ae3625dd2d3798712cd444c2b1cf9c381e5e0f606d2e6eb76
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of PDF-specific heuristics like PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=classical+gas+tab+ukulele PDF link annotation
    • http://xigewoximil.22web.org/operating_system_examples.pdfIn PDF document text
    • http://sunukekubuwaraj.22web.org/chamberlain_universal_garage_door_opener_not_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472766/normal_5fce5b6843e29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_601b24bdc26a2.pdfIn PDF document text
    • http://nisisigewu.iblogger.org/bluestacks_cn_60fps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472188/normal_602a7ae80c1a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lajuwojuwel.epizy.com/lujibawijejegovivenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/163793db-7b2a-4611-9811-a2224db87a51/cell_phone_cases_for_alcatel_3v.pdfIn PDF document text
    • http://fadudenomo.onlinewebshop.net/girl_scout_chants_and_cheers.pdfIn PDF document text
    • http://loluxemo.epizy.com/android_google_account_manager_5._0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61117b69-100b-4073-bd49-07109e14cdbf/5785063623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d477e1e-d479-4c00-af02-1cd9ed3babb9/jayco_hummingbird_owners_forum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/310325a1-1234-4889-b9b0-a0026fe2dd87/68728989742.pdfIn PDF document text
    • http://piwolimosopobu.myartsonline.com/how_to_be_legally_married_in_nigeria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f4d83bb-6e53-4c4e-b8cc-6bd06093e2ab/loxivokikejikixu.pdfIn PDF document text
    • http://pevivudawof.epizy.com/tokutogilevenizawigota.pdfIn PDF document text
    • http://puligop.epizy.com/mogitivagepemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c77ff2-19f1-4389-b359-84e0e2f253e6/schlage_camelot_handleset_satin_nickel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddd56092-0625-465e-8ca8-15a7f13e9484/graco_nautilus_65_3-in-1_harness_booster.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/3059223296.pdfIn PDF document text
    • http://vekifaxofezawe.epizy.com/22684396996.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_off0000ce06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE06 4980 bytes
SHA-256: 4af518fd05ebbeddbe236d4fa169d96fc7178d61727ad7ab018643bda9557919
font_01_sfnt_off0000df0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0B 10036 bytes
SHA-256: 88f2a919477b8e8c3ab03119f7a741dd438b8bdba26239f0cf082bfdc8000b9f

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