Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3f45c655fe1518…

MALICIOUS

PDF

38.5 KB Created: 2020-10-04 11:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 023b12904a970459af285cf26bca5ed4 SHA-1: b3ae730ea0bcc4aa9c35810c3ae7f0e454e12358 SHA-256: 0e3f45c655fe1518e603bd272d217c7779a373a80e0c8a8e46123fbff3834141
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=image+grammar+activity+book+pdf In PDF document text
    • https://site-1037228.mozfiles.com/files/1037228/fepuboronefituvesararedot.pdfIn PDF document text
    • https://site-1039391.mozfiles.com/files/1039391/wemubekipefazigu.pdfIn PDF document text
    • http://dunisit.odysseyadventureclub.com/uploads/1/3/0/7/130740082/5571863.pdfIn PDF document text
    • http://lipitedi.blockchainlingo.com/uploads/1/3/2/6/132681229/d96bc377.pdfIn PDF document text
    • http://files.transformingbarriers.com/uploads/1/3/1/4/131413678/c161737c0.pdfIn PDF document text
    • http://wojogof.lonestarfloor.com/uploads/1/3/0/8/130814687/sowilojijelapo-wawoxe.pdfIn PDF document text
    • http://gilivorad.familyforeveranimalfoundation.org/uploads/1/3/1/4/131452836/061b8a33350.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/c93aa8be-bb78-487c-860f-3a3b6267c0b0/larufedobugivin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe5145f-9df1-4c8c-aa5b-d5eaab54f962/23647324886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b154ee9-4343-4aee-b156-8f12d79359b4/97231870371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/ruler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9674/2815/files/latin_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4551/0568/files/78211752797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0245/8022/files/word_start_with_letter_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1023/6321/files/drivers_ed_in_a_box.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_off000057d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57D8 5568 bytes
SHA-256: 060b18567780a7101eea6833371a24d3113a85e1f99ef3f336b961d183330f2e
font_01_sfnt_off00006ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC0 10088 bytes
SHA-256: 73436122092697c3c788b4edcbb20cbdd891b8fdd1c9bce857cca0646329c0fc

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