Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e04bd6328bd0a1c…

MALICIOUS

PDF

81.6 KB Created: 2021-04-22 12:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 315228dc64337664b9578637b0c00513 SHA-1: bc9f5bcba4a830fa85bea14e57d2cf1cde0e49ce SHA-256: 8e04bd6328bd0a1c83a017028d0e21f0023292d05528da045f7c30ec9b3bc072
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of numerous external URIs indicates a likely phishing or SEO manipulation attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=wd+6tb+my+cloud+home+personal+cloud+review
    • https://cdn.sqhk.co/wanadujogo/fhfig1t/ticket_to_ride_europe_board_game_amazon.pdf
    • https://cdn.sqhk.co/wukibezoso/ibIiekh/ouroboros_dragon_meaning.pdf
    • https://cdn.sqhk.co/kebabefepu/hfhgvOm/fugipodigabovemeraxa.pdf
    • https://cdn-cms.f-static.net/uploads/4481828/normal_6048c97e0ca8d.pdf
    • https://cdn.sqhk.co/senogewuki/1jcAOjj/crime_city_detective_hidden_object_adventure_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4490754/normal_6020614cc3e7f.pdf
    • https://cdn.sqhk.co/gunonutib/ichcjgj/glass_go_launcher_ex_theme_maker.pdf
    • https://static.s123-cdn-static.com/uploads/4387233/normal_6007120e1a43f.pdf
    • https://cdn.sqhk.co/naliwanik/jdMihjc/color_kitchen_island_bar.pdf
    • https://cdn.sqhk.co/givogaduta/tigjhEA/multi_strike_super_times_pay_video_poker.pdf
    • https://cdn.sqhk.co/navimoxa/haXrvjx/fashion_plates_deluxe_kit_canada.pdf
    • https://cdn-cms.f-static.net/uploads/4454301/normal_600b42e5b8b39.pdf
    • https://cdn.sqhk.co/kexofodatop/jtjiqG9/20480212713.pdf
    • https://cdn.sqhk.co/tunixomaj/ehjRfWT/11060036338.pdf
    • https://cdn.sqhk.co/zujubiviv/VvTSujd/lost_sphear_all_characters.pdf
    • https://cdn.sqhk.co/sidamebo/he7LBiU/vuxibepapotimeleputifi.pdf
    • https://cdn-cms.f-static.net/uploads/4465128/normal_603c12f18d0b0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_ec7e6a253941470ab2731cda77748e16.pdf?index=true
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_33c446341cd34de1905609a3658e82e8.pdf?index=true
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_2151a51e2eab41899470e110c1ed8586.pdf?index=true
    • https://f766a7e9-a0d0-4e3a-bf7c-946d2e8c2ff4.filesusr.com/ugd/bddb96_4b885eedc9924313b49121a0142f0f5a.pdf?index=true
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_ffe249733e21440b9358ffb759854128.pdf?index=true
    • https://34fef40c-4934-4c56-b24d-59915ed92566.filesusr.com/ugd/806295_aa253275bf5d4acabe6e40c701c079f9.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff6f.bin
564cf92e70aa4efb41512d15c55ac3ef7608848c9a468579bae22dd3e19ddf6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6F 5876 bytes
font_01_sfnt_off00011358.bin
d79235df2ad602c466994976f27dd41e822ba40906998746c9943607d2760a38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11358 10932 bytes

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