Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09764418854f695…

MALICIOUS

PDF

40.1 KB Created: 2020-10-07 08:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9e234e6f08d1a184f20f71dbba762e82 SHA-1: 30bf2a1b511989680b061e4063c24834a188d0e1 SHA-256: d09764418854f6953096a30f0114bd74460f9ef3ee2451fbde97150dcc347308
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=auld+lang+syne+jazz+piano+sheet+music In PDF document text
    • http://jamulakej.balsamrootcatering.com/uploads/1/3/0/7/130776433/6193ce1.pdfIn PDF document text
    • http://files.tessahart.com/uploads/1/3/1/4/131407395/kuberijewewifuj_difumalenejix.pdfIn PDF document text
    • http://files.minimebodysculpting.com/uploads/1/3/2/6/132683165/1391d.pdfIn PDF document text
    • http://files.cliffordsage.com/uploads/1/3/1/4/131437283/1873c.pdfIn PDF document text
    • http://files.allcharacterswanted.com/uploads/1/3/1/0/131070212/3e690841c0f3.pdfIn PDF document text
    • http://kominuke.bobchisholmcounselling.com/uploads/1/3/1/6/131636745/mimoriwike.pdfIn PDF document text
    • http://files.doingjusticeishine.com/uploads/1/3/1/3/131384531/fa949b2f9.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/d4d05538-c030-458a-8dd7-2e01f1fe824d/63729296437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f47675-f8e0-4b96-8411-03de5ad2940a/zozojelusobujefuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9990189f-476d-44c8-9456-257e98109278/puzepenagawipiwimomabazax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f16986c-66d4-4efd-a33f-c5e87d92673b/gabamuloto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6282/0005/files/umich_student_employment_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9168/5273/files/2497046063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6871/8756/files/46516252910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2753/2445/files/togebut.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48DB 5608 bytes
SHA-256: c4357206989b40b5029ca4cfd85295bf201aade21df8f255a9b8506d774a3d3a
font_01_sfnt_off00005be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE4 9920 bytes
SHA-256: aabca1e5b21ddaae220b5df978f7ac5f1b2b5b1d76524cfd028e519f95537cde
font_02_sfnt_off00007e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1E 16100 bytes
SHA-256: b59afbb2f683942213df284fd86cd9422ada0c5f1ffac7698db8c94a40390bc4

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