Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a0b03b3a700063…

MALICIOUS

PDF

39.6 KB Created: 2020-10-04 22:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9c98cffb5779191332ef8dc8dfd4bc7a SHA-1: 175f2debcc7e64336b8053091b38ce873c528114 SHA-256: f5a0b03b3a7000638cd79480838feede37e1860bfbc32a8ea0d5bda2cfe4ccb6
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=cuanto+es+la+mitad+de+1+4 In PDF document text
    • http://jokenonok.thatonepinkdog.studio/uploads/1/3/0/9/130969352/3546317.pdfIn PDF document text
    • http://vujir.therapydoglovers.org/uploads/1/3/1/3/131380467/jebalojofawiku.pdfIn PDF document text
    • http://januner.nekc.org/uploads/1/3/1/6/131637365/sujikijeba.pdfIn PDF document text
    • http://files.enchantedrosesg.com/uploads/1/3/1/3/131398488/nepulipudo_pifevejufomok_nowajeduxa.pdfIn PDF document text
    • http://bivijile.msmorales-chemistry411.com/uploads/1/3/1/1/131163729/5008513.pdfIn PDF document text
    • http://jipibar.chicpool.com/uploads/1/3/1/3/131383301/todufipozaluwar-vanupofifam.pdfIn PDF document text
    • http://files.kproductionservices.com/uploads/1/3/1/4/131407435/d339a4b.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/54b65050-ee6c-477f-b56e-7dceb3bd729d/57050275483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a95a38-352b-4b41-98ed-f13372fec568/37992983553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5887/8881/files/29148802655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0304/2216/files/62036371486.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_off00005bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF9 4920 bytes
SHA-256: fad91e32ffb94dbba8df8cb91877f0a0187ad804c95082beac2d90b5154aa694
font_01_sfnt_off00006caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAA 11344 bytes
SHA-256: 5085c5c48c3229ed7acd01c8caab5cc6c31f2c2618b564fe738b4e4cafc2983a