Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4869e714f5f186…

MALICIOUS

PDF

48.8 KB Created: 2020-10-03 11:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 520dc7ce1e767e25dd6821ffd4375a94 SHA-1: 7020fd77a22ea901527a76df5470354049b48ebf SHA-256: 5b4869e714f5f1866a728ce1b71e710d6c24556ced77ad6bee3c39c1f34cec02
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=minecraft+spiral+lucky+block+1.8.9 In PDF document text
    • http://files.podcastfortherecentlydeceased.com/uploads/1/3/0/7/130739363/lowutowesiliv-dutapi.pdfIn PDF document text
    • http://files.richmondhillathleticproject.com/uploads/1/3/1/4/131453255/77043212bdee03f.pdfIn PDF document text
    • http://kuned.voltageorgetown.com/uploads/1/3/2/6/132681352/63cb5db19.pdfIn PDF document text
    • http://files.barrvillemc.org/uploads/1/3/0/7/130776118/423244.pdfIn PDF document text
    • http://files.farmacybotanical.com/uploads/1/3/1/3/131382217/3269635.pdfIn PDF document text
    • http://files.iodelaurentian.com/uploads/1/3/1/3/131381904/99068.pdfIn PDF document text
    • http://zenuse.briggsquarterhorses.com/uploads/1/3/1/4/131408017/f9024dd160f3ae.pdfIn PDF document text
    • http://files.ofshawaii.com/uploads/1/3/0/9/130969809/2744324.pdfIn PDF document text
    • http://files.beardedmaverick.com/uploads/1/3/0/7/130775130/26b2b010.pdfIn PDF document text
    • http://files.makealbertagreatagain.shop/uploads/1/3/1/4/131453950/b57c7697.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/1/0432/4183/2615/files/jamajewepobazosapiwo.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_off00007fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA7 5756 bytes
SHA-256: 31e3338a2a13f11562f6cf12a1953a3e26a3992abc0a387d20de523b053887f5
font_01_sfnt_off00009367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9367 10460 bytes
SHA-256: 7eb619f3da679efe61429a74f22d7797d14168094274ef32bcd3fa56b6c805ed