Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f5429b531e699e…

MALICIOUS

PDF

41.5 KB Created: 2020-08-21 07:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 2eb6038beebc8c30a3b263ded9c3cab4 SHA-1: 82be348ee3cab57e9730f8b6a8cab388998997ec SHA-256: 08f5429b531e699eadb376026e90458712994f767ad765d2eaf7ffa6afe7bec6
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://ttraff.com/pify?keyword=acceptance+criteria+format+in+agile In PDF document text
    • http://files.marilynsyme.com/uploads/1/3/1/3/131383045/4781335.pdfIn PDF document text
    • http://files.floridachalkartists.org/uploads/1/3/2/6/132696274/9350776.pdfIn PDF document text
    • http://zubuk.waltonbarrowboardofrealtors.com/uploads/1/3/1/0/131070374/f3be1ad78.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/1/0431/2052/5461/files/basic_mathematics_for_astronomy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1402562920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1759/1191/files/canon_printer_software_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/wasibul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7825/4753/files/sudalidebipafudiwisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/98355180905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1011/3188/files/cranial_nerves_anatomy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/big_love_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1261/8402/files/black_ant_bite_formic_acid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9834/9471/files/rejiwomebexex.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
🗂 Part of campaign: arroyooakshoa.com 4 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0D 5148 bytes
SHA-256: 93fc133eeed066e5c7fdda72ecb141e0440e1184fa6555bdba4702b6f2c5fdfe
font_01_sfnt_off00006e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E66 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000076f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F2 9896 bytes
SHA-256: 6a2b2012b83c9539049a5aa354fc373b2323274c2d88f9de711e808fa076694a