Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a98638faeb9560…

MALICIOUS

PDF

45.6 KB Created: 2020-10-16 14:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ec9affeafe00044e22be59c2c2f0ed1e SHA-1: 9ff030a8296369d4162db131c39e3d21a2cf9880 SHA-256: d0a98638faeb9560f118088a000f015a887b83f50ac2a39155172db6607c5799
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://gettraff.ru/123?keyword=bluestacks+apk+download+for+mac In PDF document text
    • https://nubojubixuxo.weebly.com/uploads/1/3/1/4/131410311/0a45d.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/domovodibaposix.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7d3707d5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/345856d9-ccc6-4ff3-b9a8-d4729864b9ca/2669050187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/389cddf2-f537-4f81-bb9b-46753a0e3fa3/midomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5e4f88-d437-4dab-9e5d-d1aeab114c62/34121687059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76516ab2-29be-4508-9f0a-79e2e00d6bdd/zazabuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5789/2506/files/lego_tow_truck_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0263/2104/files/52451804332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/1000/5658/files/zomemowisatixes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3414/7488/files/2460009985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09410d77-2618-401b-bb01-f8dbcdf60337/vusadexesejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7b00a6-2c7d-42bd-844d-6a40de336241/15932067440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a807990-633b-47be-843d-6f84ec42692f/rivebogazekidiretifenino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2936fce3-2c2e-4505-9a1a-885062df2d8f/redixokoxogit.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_off00006563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6563 5340 bytes
SHA-256: d74b88666336d61435a30d62346b18c9e40d530aced6d03c897751d50fdf0663
font_01_sfnt_off00007783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7783 10512 bytes
SHA-256: 3fc53219e0cc753c6eb1a8caa9c44ea0ec64e1e1210de5f89c549e13ccc16db4
font_02_sfnt_off00009af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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