Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d36b9d3550dc2f…

MALICIOUS

PDF

41.2 KB Created: 2020-10-04 18:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 38f6c0ed66150d52f23d7fbedf7612f1 SHA-1: b56dde94d613823540e806f7ddd7a202d22d7c63 SHA-256: a5d36b9d3550dc2f8b9a362548beaaa8945d85fb87840edfb1ba95de5f4954e9
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://gettraff.ru/pify?keyword=cold+steel+hand+and+a+half+training+sword+review In PDF document text
    • http://files.barriecowan.com/uploads/1/3/2/6/132696155/movovapa.pdfIn PDF document text
    • http://files.unlockingintegrity.com/uploads/1/3/1/3/131380005/3781531.pdfIn PDF document text
    • http://files.apiwv.org/uploads/1/3/0/7/130738679/579767.pdfIn PDF document text
    • https://site-1040277.mozfiles.com/files/1040277/21458168686.pdfIn PDF document text
    • https://site-1039644.mozfiles.com/files/1039644/wigorizokitosifigek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d9ee876-95b7-46b2-bb10-ba9ae806103a/34551195818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c17f0629-57de-471d-9a50-3f8fc5ae751f/xoluna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84cd77c5-21a0-4e8f-806f-f1f909969d73/42068234377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd287d16-f8a6-4ec7-a7f9-bcf5643effeb/83423949096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/799b9064-4731-4461-9a26-e27ade6859f6/4561147938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9502/3013/files/what_is_german_silver_used_for.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9598/0709/files/dcfcu_routing_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4402/9084/files/gejorukesagipuxogepewop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0374/2877/files/scarborough_public_school_nsw.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_off0000632a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632A 5224 bytes
SHA-256: c25506c06f391e12c7c6bf6219e04f94b42df9d6cf9bedc3ecb1096e3f40b8b1
font_01_sfnt_off000074fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74FD 10160 bytes
SHA-256: 045beed64de5add2b092e350a92162ace1c2cad012d7173bb1169937eb68b64e

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