Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8652b2fbdb0317…

MALICIOUS

PDF

73.9 KB Created: 2021-02-18 00:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: df3c94f852067a5fdee7c4e6b2472378 SHA-1: 456f86252dd19062043a7f3513f2524fe4ceb5a6 SHA-256: 0c8652b2fbdb0317de9404b95322dc79c7f22fd32d57f40fc591bbc88af1141e
134 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are disguised as download links for popular content like movies. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing or malware payload. The presence of multiple disposable domains and UTM parameters suggests a link farm designed to obscure the ultimate destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/strik?utm_term=the+hunger+games+full+movie+download+in+hindi+480p+filmyzilla PDF link annotation
    • http://ighelpcenter.xyz/chauvet_obey_40_dfi_manualqsn4m.pdfIn PDF document text
    • http://craftsmansmetics.com/rozuvafiwatoloviv5s3c.pdfIn PDF document text
    • http://giftcard-sale.store/wanidu9sv04.pdfIn PDF document text
    • http://vorgazme.com/jagut0dc8b.pdfIn PDF document text
    • http://srakan.space/89420612267p2bnn.pdfIn PDF document text
    • http://politach.com/nfl_network_channel_comcastdlsus.pdfIn PDF document text
    • http://kersita.space/supply_chain_management_free5qwvc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409000/normal_5fc7ada28e911.pdfIn PDF document text
    • http://afracheat7.xyz/bodawegemevadelzyd5o.pdfIn PDF document text
    • http://idealsit.space/5606132184978tue.pdfIn PDF document text
    • http://jobware.pro/diablo_3_icy_veins_salvage_guidejnxxm.pdfIn PDF document text
    • http://spindlndou.space/hack_aquapark._io_appvnj6my3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415546/normal_6021591f100b1.pdfIn PDF document text
    • http://eeeeeyyy.space/257990374125pc5e.pdfIn PDF document text
    • http://good-production9.site/parking_fine_appeal_letter_template_ukk9057.pdfIn PDF document text
    • http://herss.space/552812518632ay2j.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/kumijajejubobixi2ay7y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE141 6132 bytes
SHA-256: 66753c18245379e3140afea1a18a105dba1956cd598713dcd8655ad4ec49e685
font_01_sfnt_off0000f61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61D 10528 bytes
SHA-256: 214e45e1d879c72e544716337e309614245a5c080994b2a5d06b4a37f2e9fcb4

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