Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f48b320e9ae8e04…

MALICIOUS

PDF

43.3 KB Created: 2020-11-01 17:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 90aaba61c4d089ce27659408f0bea6db SHA-1: 178cbb0fc4601c82b0d4e2b64fff18a34f29a2c9 SHA-256: 9f48b320e9ae8e04cf27ffa7f875f828b58fd0b36c82111d0815c0552c391c49
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://ggtraff.ru/aws?keyword=catcher+in+the+rye+study+guide+answers+pdf In PDF document text
    • https://nelovemisero.weebly.com/uploads/1/3/4/3/134347795/gaxepokov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_5f9639742ce5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378406/normal_5f8a9613a2c7a.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/loxodatike.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/b4d60.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/sadokuxarezug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f96785df2d09.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/ranifag-taliniv-gomubowidaxima-xuwefixekijisir.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/672dcb02-3875-4b2a-81c9-ac581a9fe068/rosora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ced962-10be-4a0a-9d77-5cd1e470a895/dazaxog.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_off00005dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEE 5372 bytes
SHA-256: bb5269f9da15f10e617081605f598d3f2685da049d4e8abd0ec33f4a3a8d0b88
font_01_sfnt_off00007046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7046 9896 bytes
SHA-256: b247fe6e066dfcbd575fdec329c68a831fdb7d939d4644b5822f3671059c680f
font_02_sfnt_off00009203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9203 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176