Malicious PDF — malware analysis report

Static analysis result for SHA-256 36bde664f308ac8d…

MALICIOUS

PDF

49.3 KB Created: 2020-09-29 19:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 91fe32e77a9ee4c6b68a143d8a14b0ab SHA-1: 339430866c10dd729bef4c2b8d979344bea79f6f SHA-256: 36bde664f308ac8d146a81559624327b6bc6c1a294d09f5d4310bbcdca939cda
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://gettraff.ru/strik?keyword=dieta+atkins+pdf+descargar In PDF document text
    • https://site-1036910.mozfiles.com/files/1036910/ralikilu.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/xidivagexubilipojufo.pdfIn PDF document text
    • https://site-1036944.mozfiles.com/files/1036944/nisakepusowowuwezedot.pdfIn PDF document text
    • http://files.mcyc.org/uploads/1/3/1/1/131164236/bomivovaj_rarogelenufenam_riratu_gusilubobudub.pdfIn PDF document text
    • http://files.mrlennonmusic.com/uploads/1/3/2/7/132740620/lozowesaxikule-wusenot.pdfIn PDF document text
    • http://files.sailongrain.com/uploads/1/3/0/8/130874554/xaxixabupuwas_xagosokuji_sowujisem_kidexuwene.pdfIn PDF document text
    • http://files.mskhor.com/uploads/1/3/0/8/130874416/rurazuxor.pdfIn PDF document text
    • http://files.eliteprephawaii.com/uploads/1/3/1/4/131437380/2c9c0f518624.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://uploads.strikinglycdn.com/files/006fc282-9027-40f3-afb4-66fde90bfa9e/39283538033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1214/8376/files/74791244663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/rigirip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/nakamagogugadeguxutilebub.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_off000076e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E2 5032 bytes
SHA-256: 36d6232401fb254ffea93bbc7b181e0914e785fa359884b21c3465474dad627d
font_01_sfnt_off00008812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8812 10060 bytes
SHA-256: 7233931ffd56fe2f800802c99dd55b8dc40bb1eb6536646a9f483d26269989e6
font_02_sfnt_off0000aa60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA60 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333