Malicious PDF — malware analysis report

Static analysis result for SHA-256 f771e38bc97d82c8…

MALICIOUS

PDF

41.9 KB Created: 2020-10-08 06:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 3ddd808a2216754a4451aa3ae17950a3 SHA-1: eecb18aea2f168fd9488fc1ffdfc8c0fee21f838 SHA-256: f771e38bc97d82c8399678c4205305b624fbb1fc100873a5c6f9a0b9bbc926da
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://ggtraff.ru/strik?keyword=healthy+glucose+levels+chart+pdf In PDF document text
    • http://sofifodo.indyanda.ca/uploads/1/3/0/7/130776330/280293.pdfIn PDF document text
    • http://xodomazat.starartconstruction.com/uploads/1/3/1/3/131382982/jepasokitow.pdfIn PDF document text
    • http://nebig.lookylooseyewear.com/uploads/1/3/0/9/130969300/sarukekuwixutesu.pdfIn PDF document text
    • http://wudidoz.desertmacrame.com/uploads/1/3/1/4/131405958/9347793.pdfIn PDF document text
    • http://kabegafod.northvicgps.com/uploads/1/3/0/7/130740117/nuwuz.pdfIn PDF document text
    • http://files.tkartdesign.com/uploads/1/3/1/3/131380029/2565711.pdfIn PDF document text
    • http://files.amyziserevents.com/uploads/1/3/1/3/131398419/kakegeweforexisazilu.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/1/0431/8999/3621/files/51288908116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9966/8899/files/26249874957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0416/8864/files/55932658813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9153/3725/files/52985723508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7327/2996/files/algebra_1_average_rate_of_change_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4395/2539/files/livros_espiritas_divaldo_franco.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6423/2602/files/nubopelanexalorigajaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6382/6849/files/fallout_3_goat_test_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2535/0301/files/lalulemelowameziguzef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3698/3720/files/tilebiwatenotanokarizilik.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CB 5540 bytes
SHA-256: 7c046fa4c38a984608e3e0def7c395ea9cb2206987457b95ea41439b73287123
font_01_sfnt_off000078aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AA 9940 bytes
SHA-256: 288326478f7893811edcc2ead0dd015d7c2731cd88a8cf93f0b93acaafcd47cb

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