Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbf8aef569596b9…

MALICIOUS

PDF

44.5 KB Created: 2020-11-08 13:55:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 62a0fd4f0a86458bdf5041fbf87a5015 SHA-1: 64d5ef3efe84e47c6d46a356a0d1209c964aa3f6 SHA-256: cdbf8aef569596b9ba10a052984c90527814e15a3b2317374d53ae5c1c30d0d1
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/123?keyword=sony+handycam+manual+dcr+sr68 PDF link annotation
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/600e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_5f90d52117e90.pdfIn PDF document text
    • https://weratirotiset.weebly.com/uploads/1/3/4/3/134322017/18813182dacaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d529c81-4872-4538-96df-f9376de1ffce/31651952415.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/the_animator_s_survival_kit_francais.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/8625666511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e25cde4c-27d8-4b39-995f-a161e6f43a1d/gemazi.pdfIn PDF document text
    • https://kasujakomo.files.wordpress.com/2020/11/xojuwapolujupus.pdfIn PDF document text
    • https://s3.amazonaws.com/fulomufimikim/81967542508.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/95519257918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af5b194-f9a4-4fa1-b373-b110b53e0827/89523882176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34bcf5e5-b029-41dd-9f07-7ccba8a243e3/10_snf_matematik_konu_anlatm_dr.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_off000052f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52F5 5732 bytes
SHA-256: c89e8710b3f5592e160c29d8543ba59ff902f7e63e40be7355af8217f7c8570f
font_01_sfnt_off00006653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6653 11068 bytes
SHA-256: 49feddcc15413d4e50e78f31835cd468e4ed198bc3213a3fa5d78d4dbcddcdd0
font_02_sfnt_off00008b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B67 17396 bytes
SHA-256: b646a0c375098775356620f0b06f536f5a2abb2bee35d3c074a35ad4c1713c74

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