Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f29029ef0f31acd…

MALICIOUS

PDF

41.9 KB Created: 2020-10-04 02:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 5854ba1fff063cca725cc6d488030c0e SHA-1: 714dd40eee81b8925faeb14dd27a7f8a58c4535e SHA-256: 6f29029ef0f31acd286864aa2d26c365983fdc9ba2384375079d72b80cbf5164
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=lippincott+biochemistry+book+free In PDF document text
    • http://files.newlookwindowcleaning.co.uk/uploads/1/3/0/8/130874304/4613728.pdfIn PDF document text
    • http://files.fwjga.net/uploads/1/3/0/8/130814329/mefutamifedi.pdfIn PDF document text
    • http://liwute.risingstarzmusic.com/uploads/1/3/0/7/130738711/taseg.pdfIn PDF document text
    • http://rewajo.southcoastdevelopment.com/uploads/1/3/1/4/131438079/83f89ce.pdfIn PDF document text
    • https://site-1039784.mozfiles.com/files/1039784/3521697292.pdfIn PDF document text
    • https://site-1043314.mozfiles.com/files/1043314/narudojomazuzori.pdfIn PDF document text
    • https://site-1036839.mozfiles.com/files/1036839/genagovobobutamaxapane.pdfIn PDF document text
    • https://site-1037897.mozfiles.com/files/1037897/50815236081.pdfIn PDF document text
    • https://site-1036695.mozfiles.com/files/1036695/sejas.pdfIn PDF document text
    • https://site-1039807.mozfiles.com/files/1039807/33112871422.pdfIn PDF document text
    • https://site-1039833.mozfiles.com/files/1039833/44181679459.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/1/0428/4930/4742/files/games_not_blocked_by_school_computers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4157/8399/files/vebuxiximepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9598/0709/files/xotobawuvulapuzazikop.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_off000066fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FA 5260 bytes
SHA-256: 4451204b34676fa2f865b303e8f9dc607ec2580f56e14bc6fac1b3fa0801b43a
font_01_sfnt_off000078c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C1 9996 bytes
SHA-256: a99df56734d22a6d712750d1b4c1b10b901e678a275e3124487f98f53c8a92e4