Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc7a54ac164f2b2…

MALICIOUS

PDF

81.1 KB Created: 2021-03-17 19:20:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0339dd872be8aebd1337d455a147477a SHA-1: b7880bbb1da51bfe4073d64b59c4e804dd579c53 SHA-256: 7cc7a54ac164f2b25ad2d91e3a2931929581c5263aa268b0027cc1b6edd9a3a2
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://botokaw.ru/strik?utm_term=how+to+update+my+bushnell+neo PDF link annotation
    • http://7gusevshop.website/ladijofadadikoguxejorep7tlv3.pdfIn PDF document text
    • http://eslivdrug.space/diatest_chamfer_gauge7hcr7.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/what_is_the_most_shallow_counter_depth_refrigerator6l4am.pdfIn PDF document text
    • https://divebofa.weebly.com/uploads/1/3/4/6/134690115/satidazu.pdfIn PDF document text
    • https://palegovod.weebly.com/uploads/1/3/1/0/131070329/wurumot-vufedepiwuxu.pdfIn PDF document text
    • https://regurawuxafedan.weebly.com/uploads/1/3/0/7/130740517/jujotusawu.pdfIn PDF document text
    • https://fujazilumekopel.weebly.com/uploads/1/3/2/6/132681311/dekifuwokope.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478137/normal_5ffda7133d633.pdfIn PDF document text
    • http://jadebey-x.com/735664284266unt6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421778/normal_5fd319335a6a8.pdfIn PDF document text
    • http://lnstagram-badge-verification.com/browser_apk_android_6._0rvtq9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_0cbd757b6d1c455191ff4f03d225aa48.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/95315134-0518-4653-8391-1920e7485811/24344563790.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_be6cad6818234d6ea6ed2c187b186972.pdf?index=trueIn PDF document text
    • https://e42ce0b3-f376-4cb5-9abe-507fdbb9570c.filesusr.com/ugd/603474_9ed4687fc36f4df0a14c1f0a2b69fd97.pdf?index=trueIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_5e4ca9b13e6047c0b3d0e9c6e04bf7eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8864da2e-18a6-4c34-b411-1cb935332479/dwayne_johnson_daughter_age.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32aabe75-f746-4b8d-a4a5-78b78c4ae838/whipping_girl_book.pdfIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_84099349a95c436ea050146ee8c1a30f.pdf?index=trueIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_6e80310f4aed4ddc933e615f9c2bcee8.pdf?index=trueIn PDF document text
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_cdc670d581bb44baabc8c020f9a8dc18.pdf?index=trueIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_db3be3f3dd864fe0946562f52391ab69.pdf?index=trueIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_77242685a7444376bde072daa2b7457d.pdf?index=trueIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_00d21625aff54d659df7826b80f8c452.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 3360 bytes
SHA-256: 05b6bff659e632803a8e4c6feb8ee13464d75d2ff99a8dd7f9087758601c5167
font_01_sfnt_off0000fd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD64 5400 bytes
SHA-256: aa25b8817b6a0a6d4342c52d9ccd74bc140b6a6cbdead28ff1b02da0dbf5ee1f
font_02_sfnt_off00010fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAC 11420 bytes
SHA-256: 7328e5a769e30387fe2e75789b7545fbb733d2857e35f36b59ce77c30ca40443