Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97315d12f5f8d01…

MALICIOUS

PDF

44.9 KB Created: 2020-09-10 22:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: f7e0aabac340d0d1e5de3e70ed931280 SHA-1: 5f84116113977e2ba909f0d5e4a3e853faf1e4d1 SHA-256: d97315d12f5f8d01724266e37745a584d1eed75728c64dd556b3643c96c65aa2
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.cc/pify?keyword=anemia+por+defici%25C3%25AAncia+de+vitamina+b12+pdf In PDF document text
    • http://files.clearwaterdesigns.net/uploads/1/3/2/7/132710763/dizonusadirofokul.pdfIn PDF document text
    • http://files.dejaliyah.com/uploads/1/3/2/7/132740239/f46b7bad.pdfIn PDF document text
    • http://jewite.wss1sgradeib.com/uploads/1/3/1/6/131606490/f0ace56015.pdfIn PDF document text
    • http://tuxibef.njoutdooradventures.com/uploads/1/3/1/4/131453459/jitida.pdfIn PDF document text
    • http://gesitu.dixielandbandorlando.com/uploads/1/3/2/7/132710567/tapivo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/accd1f_af632ea51111411b96d4357126954afe.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b7306e_091d976da422497ca599aef4a7c3adb2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3de8a6_be8ff849739843b8adc482bec45c1e61.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a1fb72_9919d068bdfa442b89240c92e16a7356.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_dd536a2a81474067928e9b4219d4662d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/296484_b2bb225381cf469e8ad44b44fe1ac2b9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/4700/8673/files/cdc_hand_hygiene_guidelines_fact_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/vavanutibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4694/4416/files/83836583008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/lokurarerag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3480/4375/files/bamerapoxugeleta.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5B 5616 bytes
SHA-256: df63b886a645db7824d117781572f75871e7377de27a788ae0e00dd2cae30a54
font_01_sfnt_off00007d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2B 13156 bytes
SHA-256: 78f0a7de4842e61d9a935d11a840e52c778743b948bd072530a7defd55194920

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