Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32518e0b5dc4191…

MALICIOUS

PDF

44.7 KB Created: 2020-10-29 15:24:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3d49bda5a8a0673d1a4378f4f3c2f38c SHA-1: ca757ed41398013503feb9f5cb5c1b89fcc73bb2 SHA-256: e32518e0b5dc41915ddb6ec16169615de8f556491b744cac8cf5e7c7e52242b1
142 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=cpm+geometry+connections+answer+key+chapter+2 In PDF document text
    • https://kejijasorakabil.weebly.com/uploads/1/3/4/3/134311956/pilezig_jetizomirip_jiputalob.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/peguvadapi.pdfIn PDF document text
    • https://dudumopovidin.weebly.com/uploads/1/3/4/3/134308156/potiwi-kibib-refurabujifafor-kifikimin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_5f8975e3d5265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5f94319872c42.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/ba3f5fed-9321-4509-b5b4-0512d2dc2b47/lukigufo.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/affairs_cloud_current_affairs_capsule.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/gezozeropuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a0d31b5-fcd7-426a-9490-d6fbc675c14d/28672767105.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/wujakegekariselitisurewov.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/fejonefubofiwunitidenano.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_off00005c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C25 4284 bytes
SHA-256: 50edd1e7abd4bf5a310e76d54b8f3594702bc8c013f809641ca12bfbb8cafe71
font_01_sfnt_off00006b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B42 5608 bytes
SHA-256: 2dc1c9b8a824953f852a8a940f068af3bd4b1ff5f3bdcf90c5b5ebf11895ccf0
font_02_sfnt_off00007e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E50 11732 bytes
SHA-256: 46f8c3f92a574f567802db14fec5da4f49ae231b0dcf2489f78faefb4333bb14