Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f8403233440a17d…

MALICIOUS

PDF

45.0 KB Created: 2020-10-12 08:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 33e3d8086ea60d88ff49b287d963f8b5 SHA-1: bc3e89d880b4a07ae23eba02c105964daad57751 SHA-256: 8f8403233440a17ddb22de168a92773177f4f055b44b226fb3c9bc7e9c6120dd
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://cctraff.ru/strik?keyword=the+four+hour+work+week+pdf In PDF document text
    • https://site-1041206.mozfiles.com/files/1041206/50322068470.pdfIn PDF document text
    • https://site-1048488.mozfiles.com/files/1048488/fiferujaron.pdfIn PDF document text
    • https://site-1038836.mozfiles.com/files/1038836/xoxigidapotolatemez.pdfIn PDF document text
    • http://files.cancermessedwiththewrongfamily.com/uploads/1/3/2/7/132710694/lovojovosivofol.pdfIn PDF document text
    • http://wugota.brickstherapy.com/uploads/1/3/2/6/132683056/lolisibatus.pdfIn PDF document text
    • http://files.taps2011.com/uploads/1/3/0/7/130775354/ligogokevitovubivir.pdfIn PDF document text
    • http://files.kjscakerybakery.com/uploads/1/3/1/4/131437107/3150926.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/b02fe129-93c4-4baf-9cbc-dc7adbe3cfd3/solokepaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d64b66c-0788-4cbb-84ac-12f0ca6e242a/39595632246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6350dc4-542e-4604-8f71-7a5caa625cb7/titaxolezijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/215a6b94-0c25-4f43-b3fe-47647df88cf5/ninobevijugawovikutovulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0845/6861/files/47783287312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7850/6904/files/portrait_of_gertrude_stein_price.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2945/8852/files/raxopifejaral.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_off000074ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AD 4812 bytes
SHA-256: 54fc9e2f27053462ba59641b2cec2c7b0cd3a4ad1fe27536678bf54927672ae2
font_01_sfnt_off0000851e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x851E 10060 bytes
SHA-256: 7765d600f603873930df700605879898a48baeb5986cfdcb39759c0f6e88befa

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