Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ea7493ef1614df…

MALICIOUS

PDF

92.2 KB Created: 2021-04-14 23:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 715f38b509a3d94dc3a2085d30368dbd SHA-1: 53712c9d30ecfc5ea9782713c51d6034638a5ef5 SHA-256: 07ea7493ef1614dfef56268eb220df492da74d2179e235a173aa71c9800ca776
186 Risk Score

Malware Insights

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

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 0.9998

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://seumenha.ru/strik?utm_term=the+way+to+happiness+l+ron+hubbard+pdf PDF link annotation
    • http://zelolugo.22web.org/delhi_bus_pass_form.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/hciglIv/paper_origami_butterfly_knife.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/jfeOgdg/tufovuki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://acbe2b0b-ee64-4eea-b0ce-372b1aa9cc7a.filesusr.com/ugd/4bcc67_8e5a31654e9147cd80010cb6868ac718.pdf?index=trueIn PDF document text
    • http://sawelisibov.rf.gd/thompson_center_renegade_rear_sight.pdfIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_8839fa6f7d754d1fb7fdaeab43983afb.pdf?index=trueIn PDF document text
    • https://dc5ca969-d333-4582-9879-b719aca70d73.filesusr.com/ugd/760c43_f68af75846164b0aa49563600306e15c.pdf?index=trueIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_a23bb6c0f9b24e90b309ec3e33350daa.pdf?index=trueIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_7ead687b47da4ea485d67a9cb8def7a1.pdf?index=trueIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_f07a59c69fed40fea59905cc97b1c13e.pdf?index=trueIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_d85a4b72de7b431bbbeceeb5d9d8d19f.pdf?index=trueIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_c6543a3309da4fd3ae717442d8e794e5.pdf?index=trueIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_61c6bc5cf5fb4b6d8f4c4ee8f4f9bad9.pdf?index=trueIn PDF document text
    • http://mafonoxerinomif.epizy.com/kerepasowoviwopogano.pdfIn PDF document text
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_8fa85cb075a44b29839342dcd870929b.pdf?index=trueIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_880f9ead9c704bceb23d763996ea4cfe.pdf?index=trueIn 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_off000128ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CA 5412 bytes
SHA-256: 9a8a059d997a096cce6c1047f3e26939249d3d16082b6a9122b85a9d36272fc3
font_01_sfnt_off00013b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3B 11280 bytes
SHA-256: a3968125abd8ffbf6cca7d71f0fa880e1616e8936d6e5a5d1048301ae90fc795

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