Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a90f5da41632a24…

MALICIOUS

PDF

35.0 KB Created: 2020-10-05 12:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 299b47c0010ac71140f82de5538aef3f SHA-1: d4034002e848fc3b43adcf3939ca637bd622b3de SHA-256: 3a90f5da41632a2440c6f3fedc06d99409a39de092e05b32f50a6645169ff81d
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://ggtraff.ru/strik?keyword=seven+longings+of+the+human+heart+pdf In PDF document text
    • http://xijore.drginamaffia.com/uploads/1/3/2/7/132740978/kenar.pdfIn PDF document text
    • http://zezimifek.mcbstudiobackdrops.com.au/uploads/1/3/1/0/131070289/woregofug-pifibosupixate.pdfIn PDF document text
    • http://files.destinationscareerfair.com/uploads/1/3/0/7/130775489/5255663.pdfIn PDF document text
    • http://files.pederistad.no/uploads/1/3/0/7/130739379/6470286.pdfIn PDF document text
    • https://site-1039274.mozfiles.com/files/1039274/duwagilolukufavatidafa.pdfIn PDF document text
    • https://site-1042496.mozfiles.com/files/1042496/62567825325.pdfIn PDF document text
    • https://site-1036684.mozfiles.com/files/1036684/zumebifija.pdfIn PDF document text
    • https://site-1038837.mozfiles.com/files/1038837/suxukewajerisi.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/7bf7d1db-c2d2-461a-b455-d9d6839ba8c9/fovuguvale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5dbd51c-eb9a-4e1f-8f4f-fd11f19076a9/19986410135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4383fd35-af6a-4237-b081-161646047a8b/62598605906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1982cbff-d4be-48ea-ba98-5327f6781e10/24846368547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b867b81-b80a-48f2-bd4e-9357ba57e051/pozabovakiwagagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4de82b3d-a4ab-45d3-aa2c-dfe8725c93f7/lifemasidetifijiwalenopof.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_off000049c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49C1 5616 bytes
SHA-256: 9e26bd9bb5d67272e928d8132580ca35128349079a58b24f5d1d1df839d05580
font_01_sfnt_off00005cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB7 10156 bytes
SHA-256: 3696be85acdbe93264c268637820da5b5fdcd7e4b69ea9becdc88539f3ddd23e