Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07a607b3c5e7792…

MALICIOUS

PDF

48.8 KB Created: 2020-10-04 02:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 96efa76748dcc178354f4601fcbf99fe SHA-1: e6a51d562ef4b2e06be7cbb65c2579c7ff2e6170 SHA-256: a07a607b3c5e7792f70ba9d2749cdd033960b8878d1cd213d21252b140cd9742
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://gettraff.ru/strik?keyword=cogat+practice+test+%2528kindergarten+and+grade+1 In PDF document text
    • http://mokebefut.placervillechurchofchrist.com/uploads/1/3/2/8/132816091/zebov.pdfIn PDF document text
    • http://files.laurenshupp.com/uploads/1/3/2/3/132302859/3386330.pdfIn PDF document text
    • http://files.annakramerwriter.com/uploads/1/3/1/4/131410685/8804239.pdfIn PDF document text
    • https://site-1039783.mozfiles.com/files/1039783/pewujuzapug.pdfIn PDF document text
    • https://site-1039513.mozfiles.com/files/1039513/24272942136.pdfIn PDF document text
    • https://site-1039633.mozfiles.com/files/1039633/2417355088.pdfIn PDF document text
    • https://site-1042985.mozfiles.com/files/1042985/25502201979.pdfIn PDF document text
    • https://site-1038782.mozfiles.com/files/1038782/20593360722.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/47660520489.pdfIn PDF document text
    • https://site-1040082.mozfiles.com/files/1040082/66471282838.pdfIn PDF document text
    • https://site-1042275.mozfiles.com/files/1042275/26499035870.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/1/0438/1740/2530/files/regent_ht-2004_manual.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_off00007df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF1 5308 bytes
SHA-256: 8b8da746d81ca09efa84f02e6da2cd60ca56e1ff1a85427eb93da34a2b337e0b
font_01_sfnt_off0000901d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901D 10816 bytes
SHA-256: 20f55f3bc90a7c2648d1800a46dd9a47ab0bb145e7c8e3cb1501e1df0a93d559