Malicious PDF — malware analysis report

Static analysis result for SHA-256 3373a9cbf776e243…

MALICIOUS

PDF

39.5 KB Created: 2020-10-08 07:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 85995d07d35d11050dcb4b604a01fe0a SHA-1: 9015fc643e16f6584b7e78c564b063a16b55c2c4 SHA-256: 3373a9cbf776e2438bbcff4269816ea8a950677398100ecfdec6faaa812a87c2
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/strik?keyword=farberware+air+fryer+oven+recipe+book+pdf In PDF document text
    • http://files.crazyartmama.com/uploads/1/3/0/9/130969577/883d5498b.pdfIn PDF document text
    • http://files.jasminmujanovic.com/uploads/1/3/0/7/130775727/4be7903847f.pdfIn PDF document text
    • http://files.industriallandscapes.org/uploads/1/3/1/4/131437474/7236a16fe9.pdfIn PDF document text
    • https://site-1039517.mozfiles.com/files/1039517/9794681132.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/1/0497/3114/1783/files/bugagegafonutujilomip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9903/6579/files/libokupukesixagavet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1242/6397/files/john_fogerty_hot_rod_heart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7131/4326/files/93084151217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5443/1907/files/power_of_attorney_kentucky_requirements.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/70141422694.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_off00005ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE9 5352 bytes
SHA-256: 36bbf18d538ce6c90b9971616b110ad875e8bb899e10652d7caec0a87ad4b40e
font_01_sfnt_off00006d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D52 10592 bytes
SHA-256: 239c7bd89069a2a34b97dcd64ddc266a965df43d04eb5ac6ed47c88dc155a2c5