Malicious PDF — malware analysis report

Static analysis result for SHA-256 29dcad9e51be89f0…

MALICIOUS

PDF

42.7 KB Created: 2020-11-04 11:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 79935a9428a06681a722d03556ace3a5 SHA-1: 4fa516dcc505ea0324303bf49bb63629fcdb16e4 SHA-256: 29dcad9e51be89f03ad9bebe07a0049fc39d50e1a218d7499514d169b160095e
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=2nd+kalma+for+kids+learning In PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/konumos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_5f972468832f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_5f8bdc76132a8.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/e2722c4f-7ec9-4964-8a52-3dce92a5d9b6/stihl_backpack_blower_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd7a5f4-ad5c-4483-b69c-fedbbc4a89db/80452509123.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/80361419341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2855/9510/files/designs_in_machine_embroidery_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/1411603070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61610d7-6dc1-45a2-88f5-8f3f29d6a701/kopulof.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/xewemafovevibotepeturipep.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/bud_light_seltzer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2bf3186-f9c4-41b2-a11f-99e9928b1d37/64858897414.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/22794474116.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/ataxia_rehabilitation.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_off000067cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67CB 5328 bytes
SHA-256: 38352ce31b48e3303e4ec54417c6585f6f9fa379b9d27c440e83458d4876e4af
font_01_sfnt_off000079d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D8 10624 bytes
SHA-256: a1cfe6941e4759ccfa7614cd90efd6e46547d90595ecc02f4dac57db4a5ceca5