Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05e642b9478b4b9…

MALICIOUS

PDF

40.3 KB Created: 2020-08-08 05:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: daf224ede6cf511d42e49780af24bff2 SHA-1: 343da30478714a5288d417b2b38ca8229e077cc8 SHA-256: a05e642b9478b4b9384659b95e0c8b833efb4ebbfd1a21ca5d573bba39ce257d
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=anteproyecto+codigo+procesal+civil+y+comercial+santa+fe+pdf In PDF document text
    • http://files.ward72joburg.net/uploads/1/3/1/4/131406348/nomosawizubot-xogukilipur.pdfIn PDF document text
    • http://files.stripesshop.com/uploads/1/3/0/9/130969525/588cd2.pdfIn PDF document text
    • http://files.shoplandmans.ca/uploads/1/3/0/9/130969231/639596.pdfIn PDF document text
    • http://files.nextbuildingforum.com/uploads/1/3/0/8/130813934/a76ef47c7bb.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/1/0428/9835/8432/files/wonazonuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/augmented_reality_journal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/45607786995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/64370248443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1903/3000/files/pivudezazosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/mewuguduwazesomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5321/2057/files/91865162074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5751/1590/files/32688110893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6598/3655/files/46876196343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/mario_party_5_rom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5492/3925/files/jepuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/tezinidagatopuraretuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/inciting_incident_definition.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_off00005d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0A 5628 bytes
SHA-256: 5d3964f0ff2a4331d767ee7155e02e271900f6e8e7856e3ae54007aece9bdde1
font_01_sfnt_off0000703a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x703A 10388 bytes
SHA-256: ed59691ea58eb26160ffac2726f9511f33e9272987aa5ff9b312c935c1e65811

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