Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f5f3aaaae1ab1f…

MALICIOUS

PDF

41.7 KB Created: 2020-10-11 07:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fc4260514c88591ae8f9345d81a08ddc SHA-1: a51d09e6b8829cea5aac4a5ffeb1a76510396226 SHA-256: 60f5f3aaaae1ab1ff8ce595cb5d746798345b63ea1f9f6479a1431755ef7a249
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=old+marble+price+guide In PDF document text
    • https://site-1039578.mozfiles.com/files/1039578/lobujatosiveluj.pdfIn PDF document text
    • https://site-1041684.mozfiles.com/files/1041684/83777435778.pdfIn PDF document text
    • https://site-1044157.mozfiles.com/files/1044157/5270769524.pdfIn PDF document text
    • https://site-1043403.mozfiles.com/files/1043403/18943259364.pdfIn PDF document text
    • https://site-1040037.mozfiles.com/files/1040037/3097648915.pdfIn PDF document text
    • http://files.thecitydesk.com/uploads/1/3/1/0/131070485/jawemulerozije_megidorotasi_jafag_nubopu.pdfIn PDF document text
    • http://files.toharlev.com/uploads/1/3/1/4/131437413/034502c.pdfIn PDF document text
    • http://lobiwubo.batteryconservancy.org/uploads/1/3/1/6/131637814/e606b0a.pdfIn PDF document text
    • http://files.hometowncreationsllc.com/uploads/1/3/0/7/130776164/sagujotojiziwagud.pdfIn PDF document text
    • http://files.kambengtrust.org/uploads/1/3/1/4/131406537/c978b6066.pdfIn PDF document text
    • http://wufavag.mindfulmusicacademy.com/uploads/1/3/0/7/130739101/nomijiwovaz_fuduwepef.pdfIn PDF document text
    • http://files.buttroselandscape.com/uploads/1/3/1/1/131164308/pitozupujapeda.pdfIn PDF document text
    • http://files.stuffbyjonbonner.com/uploads/1/3/2/6/132681832/32037.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8717/6900/files/65061342703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9087/7845/files/62301347947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9944/6693/files/journal_of_leukocyte_biology_impact_factor_2020.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CD 5380 bytes
SHA-256: bbfb17eef5a2fd4a33620169ac646836f53d034bb490b9012748f5976f3e6359
font_01_sfnt_off000076f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F5 10308 bytes
SHA-256: a746d23c1d4f9869666113363cb2f08662277c11b03edbbf34cbd2609663a79b

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