Malicious PDF — malware analysis report

Static analysis result for SHA-256 24242308e0e83a17…

MALICIOUS

PDF

45.6 KB Created: 2020-10-03 01:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 72a2aec5bd24b6218cd55d57abe8ba8d SHA-1: f7880400e85032e6577b31f9dffc10170325fbb9 SHA-256: 24242308e0e83a17ab21eeeb4c66ab5e3ad3cd56b720839206483105a241e4ad
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://cctraff.ru/strik?keyword=mastering+biology+answers+chapter+14 In PDF document text
    • http://rujozixel.modernebarnwine.com/uploads/1/3/1/1/131163635/5bd7b6cb3e.pdfIn PDF document text
    • http://pomova.kitchenettecuisine.com/uploads/1/3/1/8/131856005/627316.pdfIn PDF document text
    • http://files.mrandmmeb.com/uploads/1/3/1/3/131380985/9597118.pdfIn PDF document text
    • http://files.anthonydramsey.com/uploads/1/3/1/8/131856163/2108789.pdfIn PDF document text
    • http://files.southsurreygardenclub.ca/uploads/1/3/1/4/131453021/4501542.pdfIn PDF document text
    • http://files.gailbeckerrughooking.com/uploads/1/3/0/7/130776619/535ad5a.pdfIn PDF document text
    • http://vapuwa.marinasinclair.co.uk/uploads/1/3/0/9/130969418/sesumusinebanov.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://cdn.shopify.com/s/files/1/0434/5305/5128/files/is_are_a_verb_or_preposition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5029/4171/files/mtga_season_rewards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3766/2613/files/nimitepuwesamivozevid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3401/2579/files/pozamiwapomebotuwusid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/5851/8184/files/the_ants_go_marching_lyrics_meaning.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_off0000653e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653E 5460 bytes
SHA-256: 34f316083c61e9d09c416c639b6ee58c6b357819bf901191751d28eca1990a15
font_01_sfnt_off000077dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DD 10236 bytes
SHA-256: c79d592ab1eb76b5a2043dc88d3811a3f17f89522ed002c97c55f5715bcb9b5d
font_02_sfnt_off00009ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e