Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f402d6fe83eff13…

MALICIOUS

PDF

47.9 KB Created: 2020-10-05 17:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: badd006afb12e55c46a414016ef9cecd SHA-1: baeec2b416157785fbc02f3c1c187d75decc6870 SHA-256: 8f402d6fe83eff13ba6de6bf4e661d8d28cd384f6b8d2eb5b6da1b972f1466c5
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?keyword=talking+back%253A+thinking+feminist%252C+thi In PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/noboleposisowabonulame.pdfIn PDF document text
    • https://site-1037114.mozfiles.com/files/1037114/godakitovojinegivodosadi.pdfIn PDF document text
    • http://zenujuvi.cheltenhamconnect.co.uk/uploads/1/3/1/6/131606165/3798036.pdfIn PDF document text
    • http://boparejog.pro-activemuscletherapy.com/uploads/1/3/0/7/130739063/8aa813782.pdfIn PDF document text
    • http://files.murdockcounseling.com/uploads/1/3/2/6/132681038/2854476.pdfIn PDF document text
    • http://genav.paulsmacs.com/uploads/1/3/1/4/131452903/7066542.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/433e6ffc-56c9-42dd-965a-49f507a4a3cf/1390524747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/403f4fd5-3769-47d4-bfa2-018254a31541/87731823870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/848ee6b3-385a-4688-82c3-05385780f9b6/vopiwituwapesarajipof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4590/7349/files/34819346917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2927/4007/files/57651060099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7895/7718/files/no_mans_sky_ships_by_race.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4685/7621/files/neptune_god_of_the_sea_tattoo.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_off000064e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E7 5460 bytes
SHA-256: bd9c1608bded14e5f555c10008d4288461af1a02509347ffea1555d63a450fc3
font_01_sfnt_off00007769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7769 10128 bytes
SHA-256: 1fda86f2bac046e4c34a6fa617887c76291dc9b1d9128b95c2189e0bab492ec0
font_02_sfnt_off00009a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A01 17020 bytes
SHA-256: cd81b9df0286877924530a42ebb2608c4dabcebb1ed65db3767460e261c14a4b

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