Malicious PDF — malware analysis report

Static analysis result for SHA-256 c505dd44e69a4adf…

MALICIOUS

PDF

78.3 KB Created: 2021-04-20 06:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 569b1dab33a65e27b633e567fa4f603d SHA-1: b091233e6de18bb472be7d90d18d6efd20859ae3 SHA-256: c505dd44e69a4adf5aa0b66c388b575ea1a533aaa4d3fcc14ed87daa2fe630c0
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 0.9993

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://midufefew.ru/strik?utm_term=corporate+identity+manual+book+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388596/normal_5ff0b7f183f29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416790/normal_5fee98624bcd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487419/normal_603566adc4bf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471704/normal_6044942b98759.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/iijgfii/pifarunimaxepavo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474220/normal_6033248fb1332.pdfIn PDF document text
    • https://cdn.sqhk.co/wotirixa/Jyibhj3/66055631488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485930/normal_6055fc4c84ee5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451929/normal_5fdeefbea0521.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/xjjgehh/19857321471.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.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/e71eb067-9b47-4db5-91bc-1f65d501d932/pugokaxubefita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e20d39d-af18-4f8f-a58a-3ac4e1297752/79473792463.pdfIn PDF document text
    • http://mimosomudex.rf.gd/famous_female_warrior_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6226dfa-d71c-48c7-998f-200f7f2a728c/what_do_i_do_when_printer_driver_is_unavailable.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/como_es_profesor_asociado_en_ingles.pdfIn PDF document text
    • http://sonevusejebazu.epizy.com/exploding_box_template_printable.pdfIn PDF document text
    • http://fokavugepiromi.epizy.com/85511463529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed12a29-bb1b-4fc7-8cef-1d4940d1b7da/garmin_vivofit_jr_2_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bf37e1-ea4a-40d0-bd38-d149bc9d0f70/how_to_clean_dehydrator_trays.pdfIn PDF document text
    • http://wutebanik.epizy.com/65426551804.pdfIn PDF document text
    • http://julukawava.epizy.com/ridus.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/why_is_my_dodge_durango_overheating.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_off0000f48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48E 5220 bytes
SHA-256: 4a12cbf01764ebfcb2996e7cdc47b38bff806072aed75b4e53a0203369bc6738
font_01_sfnt_off00010641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10641 10424 bytes
SHA-256: 9ab0298963202ac2876f8c2886f52039c490b9dcf301ecd0294046b84c712479

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