Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd8d725f4643ab1…

MALICIOUS

PDF

37.7 KB Created: 2020-10-01 00:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6876814b6c3aaa68f2724c1670c2f551 SHA-1: e2bc4a2ea416d68134a595c36050dda42f7c7a69 SHA-256: 9fd8d725f4643ab16f6f5f7f961766ec632a6bd473e2fffccc101749633e9d71
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=aldis+job+application+pdf In PDF document text
    • https://site-1039289.mozfiles.com/files/1039289/lokor.pdfIn PDF document text
    • https://site-1037844.mozfiles.com/files/1037844/luvewopogitukowobox.pdfIn PDF document text
    • https://site-1036759.mozfiles.com/files/1036759/bonumafawugevimetij.pdfIn PDF document text
    • http://duvusa.rebeccajoymohrlang.com/uploads/1/3/2/6/132680813/kadusazulubit.pdfIn PDF document text
    • http://lumipav.hellokaelo.com/uploads/1/3/1/0/131070450/f2b0becb3b.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/8c51762a-bbf4-4bdd-be21-bfd3e6ce6b6b/mifasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73784e0c-7329-4a9d-a7b0-e6536d1a1d33/12714221555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42fb24e-3ddf-40a2-bee4-338c00298ce4/taroxiboxilawojemisos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b368e1a-e166-4ae0-bc79-5a3f75aa9e93/vapekivujozosupofinimagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/wujut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/kasifabapiluto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8121/1802/files/53869208009.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4454 3960 bytes
SHA-256: b18349ffb2c545c7941eedccbd44a3d13569291f827f0c1f78b31480c6a0e37e
font_01_sfnt_off0000526d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x526D 5256 bytes
SHA-256: 5da3286873f6508154c354b1e8196393c5cd7dbf6842f880836e2b19d5d65461
font_02_sfnt_off00006464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6464 12048 bytes
SHA-256: e606f4406cdebd70d1687f50d7e85cc8dc493f1048b79aa826a7fe37e74ed50d

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