Malicious PDF — malware analysis report

Static analysis result for SHA-256 f556322537842f7f…

MALICIOUS

PDF

84.6 KB Created: 2021-03-06 13:20:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c9dfe1ac435370869d401b3351112516 SHA-1: 099410c6c3b5f4cbc3654efdb6ebfa3d18171db2 SHA-256: f556322537842f7fb364d874b427d422d114afaa8fe49a90b4de68e3119a18a7
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, disguised as a search result for free streaming content. The PDF structure and embedded links suggest it's part of a link farm designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/award?keyword=how+can+i+watch+season+3+and+4+of+outlander+for+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403680/normal_600a51c87f41e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499285/normal_601985858a367.pdfIn PDF document text
    • http://rivilidopu.medianewsonline.com/george_foreman_grill_instructions_hamburger.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/husqvarna_445e_ii_18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421466/normal_5ff58b0e44cfd.pdfIn PDF document text
    • http://namafafiteg.mypressonline.com/39681191968.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/how_to_get_initial_velocity_and_final_velocity.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406806/normal_5fcd0ef8177b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_5fda52a682ff8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455179/normal_6026d38652a69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470028/normal_5fe1a5c20c56c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474223/normal_5fe3a13f33d55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494139/normal_60054bc20f3cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_7390a735f0114578a440fc764043b34d.pdf?index=trueIn PDF document text
    • http://peledopa.myartsonline.com/1203227768.pdfIn PDF document text
    • http://vuwejamadadodi.epizy.com/category_theory_programmers.pdfIn PDF document text
    • http://vurasoda.rf.gd/61680860991.pdfIn PDF document text
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_350bc6976dad48748b1fc84c91f40da0.pdf?index=trueIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_91b827b4f04e470dae70452692d0588b.pdf?index=trueIn PDF document text
    • http://bototiluwoge.atwebpages.com/sharp_aquos_blinking_power_and_opc_lights.pdfIn PDF document text
    • http://dirazonun.myartsonline.com/36699450459.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF8 5296 bytes
SHA-256: 0b87faf2dfb266133091e7ac3fda261dedbf69a9d24fd88a38abe3b7b8a00936
font_01_sfnt_off00010ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFA 11124 bytes
SHA-256: 5c2d58749006c4c0239a39468aeee61f076b8ea0db1841dde45f261df92e2331
font_02_sfnt_off0001360b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1360B 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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