Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22cea6d3579b334…

MALICIOUS

PDF

75.4 KB Created: 2021-03-06 16:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 373011c9dd9d13fa61f778df0d6d6d8e SHA-1: c1fcd95767226af4ae93108f1461bd6c594c1415 SHA-256: a22cea6d3579b3341378c1993b3d266db55d83810aa60aa4a864ff31844ae10b
186 Risk Score

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://golowaki.ru/strik?utm_term=basketball+inbound+plays+for+youth PDF link annotation
    • http://keysecret.ru/gcse_sine_cosine_rule_worksheetrt0jv.pdfIn PDF document text
    • http://vir-tus.com/how_to_fix_jammed_gun_dayz_xboxv8lvk.pdfIn PDF document text
    • http://pravagims.net/34156431718ca3kc.pdfIn PDF document text
    • http://raisinshub.club/19903861010i3n6n.pdfIn PDF document text
    • http://mstmail.space/mabegamf0vzx.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/strikemaster_honda_lite_ice_auger_for_sale.pdfIn PDF document text
    • http://lebepufu.mypressonline.com/24384126766.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/z_table_confidence_interval_95.pdfIn PDF document text
    • http://crystal-light33.ru/railway_ntpc_online_form_2019_sarkari_result136vz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_6d3258d351074b0289d72a3185f36756.pdf?index=trueIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_897f07d5b0b2405f9ee89351717d8e82.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/putelekireza/52832386771.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_c7c2020ac029444fa18ec19c062bec18.pdf?index=trueIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_4a88d90eccd54c61b841b814af4c45c1.pdf?index=trueIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_d1f130f6737342ce83f106fa896f323d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/banorizepemisuxebiba.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/99197356561.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/51583021094.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_off0000ead9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD9 5484 bytes
SHA-256: 1e31ac8ed42364c23001cb81a842d15d673f968714724ee615e79f4fec507933
font_01_sfnt_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 10280 bytes
SHA-256: 6110483d8ddb7b46da2673c686f940dca35c798baf4ce907ce1bfebdd7d2c3b0

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