Malicious PDF — malware analysis report

Static analysis result for SHA-256 756ada3ad83dd32a…

MALICIOUS

PDF

40.6 KB Created: 2020-10-10 21:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 87c05642c7adc790f7ac30762c90a043 SHA-1: e3edce5be2663dde371274c845e1720360acf36f SHA-256: 756ada3ad83dd32a2d069fd596d874b21b4833ac09197835dae25060a2873d66
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/pify?keyword=case+files+emergency+medicine+pdf+download In PDF document text
    • http://files.valleyliberator.com/uploads/1/3/1/8/131871864/7605092.pdfIn PDF document text
    • http://files.elizabethmallia.com/uploads/1/3/1/8/131856277/86c61ab914.pdfIn PDF document text
    • http://viwofono.kitosbiotech.org/uploads/1/3/1/0/131070993/4334879.pdfIn PDF document text
    • http://files.yoansewingstudio.com/uploads/1/3/1/0/131069766/6063431.pdfIn PDF document text
    • https://site-1042770.mozfiles.com/files/1042770/movajijukutise.pdfIn PDF document text
    • https://site-1037145.mozfiles.com/files/1037145/toxotezuzenozaza.pdfIn PDF document text
    • https://site-1048515.mozfiles.com/files/1048515/mebepawubejezi.pdfIn PDF document text
    • https://site-1040224.mozfiles.com/files/1040224/rasemafobijo.pdfIn PDF document text
    • http://files.jessestewart.net/uploads/1/3/0/8/130813694/24214.pdfIn PDF document text
    • http://files.mrscolessupersciencesite.com/uploads/1/3/2/7/132740423/590963.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/7a073256-4663-476f-bfd4-2b74919a13ee/davejigafofuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad46df31-1937-40eb-91f6-27f5215920af/devasobiwositaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c764b2f5-92db-4714-9e70-a98dfb21d1c5/melikojozozojaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd41b7e-189a-4d1a-944b-6c49cc847cda/9203482490.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5635 5572 bytes
SHA-256: 21969c3ff5ded25160e720ca4f17a59d983b63e13b81e94d1ccc5b6436e0d03f
font_01_sfnt_off00006920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6920 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000071ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AE 10316 bytes
SHA-256: fbb59791ca0f7b1a897ead20f3ecf2eb8f6567e070b87c013883188ae3bfb74f

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