Malicious PDF — malware analysis report

Static analysis result for SHA-256 795ddd94255a9dbe…

MALICIOUS

PDF

52.8 KB Created: 2020-10-01 23:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0b06e75736544df58df46ef73d83a9eb SHA-1: a2816fc491b2845fcde2c169d323b61c00860d0b SHA-256: 795ddd94255a9dbe870e781843314b030d4ea9f1cb74446a2d9adba242d0d69e
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=you+can+download+the+missing+scenery+through+steam+x+plane In PDF document text
    • https://site-1038489.mozfiles.com/files/1038489/82281107273.pdfIn PDF document text
    • https://site-1038321.mozfiles.com/files/1038321/wuwutabuwikelage.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/73262162184.pdfIn PDF document text
    • https://site-1038323.mozfiles.com/files/1038323/45601628097.pdfIn PDF document text
    • https://site-1036746.mozfiles.com/files/1036746/kexabum.pdfIn PDF document text
    • http://duwopew.diveststanford.org/uploads/1/3/0/9/130969060/9202873.pdfIn PDF document text
    • http://files.hertzogfamilyeyecare.com/uploads/1/3/0/7/130739340/xevikeborutusovuma.pdfIn PDF document text
    • http://files.blubocker.com/uploads/1/3/0/7/130739513/8067206.pdfIn PDF document text
    • http://files.10-yranch.com/uploads/1/3/1/8/131857024/kosurokotiniz.pdfIn PDF document text
    • http://files.augustrise.com/uploads/1/3/1/4/131437380/tunajurelaka-kuwolaxogidobo.pdfIn PDF document text
    • http://sivabenu.fountainpro.com/uploads/1/3/2/8/132815961/fogugi.pdfIn PDF document text
    • http://files.ehbosselmt.com/uploads/1/3/0/8/130873710/dazelufejesojo-gebatoga-jevamobu-jolamet.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/1/0438/8657/5771/files/fanavatewuposalubabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7846/6201/files/xidezojalametawabezawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0282/3331/files/9181990574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/forty_million_dollar_slaves.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_off00008f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F74 5708 bytes
SHA-256: 39b047117d9a394e34a5dcb44b4883974540be6747d232aef4697d65b2fe133b
font_01_sfnt_off0000a2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2DB 10192 bytes
SHA-256: 17f2e0b9df4563726e186123e01e971d4eaab6497b88bae62644a6bc21e6f5e0

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