Malicious PDF — malware analysis report

Static analysis result for SHA-256 4210592644d55f8d…

MALICIOUS

PDF

78.4 KB Created: 2021-02-28 04:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 57f540092e43a44a1d9dd1663ba1d757 SHA-1: d983da83b848d3ac727b498cadd814fff87d32a0 SHA-256: 4210592644d55f8d62caa92a142bea5ea5cb1342a0868bc25dcbffd208f6573a
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the classification as a link farm, likely used to obscure the true destination or spread malicious content.

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://jottigo.ru/123?utm_term=en+bonne+forme+meaning PDF link annotation
    • https://cdn.sqhk.co/motulobugaji/gfRhdja/the_jackbox_party_pack_7_soundtrack.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/why_is_my_phone_saying_no_network_registered.pdfIn PDF document text
    • https://cdn.sqhk.co/josozudibud/2GhtfGE/torujadonuraf.pdfIn PDF document text
    • http://braco.ru/customer_service_policy_and_procedure_templatexrh4j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426558/normal_5fd2726881670.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/hc28Ons/merge_merge_cat.pdfIn PDF document text
    • https://cdn.sqhk.co/sikibeve/zAhe6OG/xozokowofazevo.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/bjhjhhg/.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/35294114854.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424981/normal_5ff8b396a60d5.pdfIn PDF document text
    • https://cdn.sqhk.co/fanoxozowupe/hij3jdR/let_me_draw_nearer_lyrics_and_chords.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421329/normal_5fda806947774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_601ff91633fcd.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/jghgohN/clumsy_ninja_hack_2020_ios.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/rekobaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/hjcffci/touch_em_all_rogers_mn.pdfIn PDF document text
    • http://electriccannoz.club/27387926197vsmkq.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/learn_aramaic_hebrew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_5fd68a3452033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475989/normal_600f2daa66462.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tivakifuzir.atwebpages.com/6635086031.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA41 4976 bytes
SHA-256: 8ee515132fb74090bf1974aa7253824f7be1b061225a77a380bd0b30c4019dd1
font_01_sfnt_off0000eb1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1D 13772 bytes
SHA-256: 2c7a4a562b01dade714e1a7bea5008c3f393d2fc331ddac04b27597d4325c84a
font_02_sfnt_off000115b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B9 16068 bytes
SHA-256: 1f10eee925fbe99070ce930aad2781db9cd53dceef6a88ee5d5c61933f6ad089

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