Malicious PDF — malware analysis report

Static analysis result for SHA-256 668db88ab60e46b3…

MALICIOUS

PDF

41.4 KB Created: 2020-11-05 08:04:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ebe9e292d669d0f8be761d71a42f3255 SHA-1: 58e9f97292a644a6646d6e7412c7ca1fa4dbcfe0 SHA-256: 668db88ab60e46b3534483823d19db0abff166197cdc1da926923f07b1191298
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.me/123?keyword=ninja+ultima+blender+bl820+locking+lid In PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/5977359.pdfIn PDF document text
    • https://mitemulesebiped.weebly.com/uploads/1/3/4/4/134479511/b6f94dcb4d6a2f.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/supufem.pdfIn PDF document text
    • https://jazafojof.weebly.com/uploads/1/3/4/3/134310209/bd71c46657.pdfIn PDF document text
    • https://talasawag.weebly.com/uploads/1/3/4/2/134265385/9fcbd22378.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/1f200a20-3aca-42c8-a22f-c9aa7e45e6a3/kexodikuwizerefuvupabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c748d0e5-5dca-49b4-8b1d-ba973eb48e0c/70642164438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc4f5321-71d0-475e-a17b-3573585cf278/71671992448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b2a60e-f88f-4e2f-926f-a21b1658337c/tajowetasimufilavilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fecafaa5-2593-4b03-9e33-30e8d057f524/metro_2033_sex.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/sumit_yoga_biltmore_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/65282486090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/879ffa8c-b996-4ad4-a14d-1ed61ecaeb5c/.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/46062689303.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000458f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x458F 5796 bytes
SHA-256: 6ebaf3264635709d89369fc743b554d595a789334d949574ac0b1aa6836997ca
font_01_sfnt_off00005940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5940 10056 bytes
SHA-256: dec7003cd39141a74e7ea0053f82381c418f1aab09c03beed6c791263926593c
font_02_sfnt_off00007be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE5 18300 bytes
SHA-256: 13074780ee7994d513d7af191e10321a32037d33f3b9d3d8eba58a5d7a6c999a

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