Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8630543264bc13…

MALICIOUS

PDF

41.9 KB Created: 2020-10-08 15:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a5f347b6e0613640765c9f024c944f8f SHA-1: a63204c2f68e1ebcff33899818156c9e6ea857c9 SHA-256: ae8630543264bc13020407ebccf298faabf5b6c6f31bc4a65661b95ef240dd5c
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://cctraff.ru/strik?keyword=video+star+pro+apk In PDF document text
    • http://mosapidis.kohoboutiquestl.com/uploads/1/3/1/4/131407995/winugeledozana.pdfIn PDF document text
    • http://files.southashlandumc.org/uploads/1/3/1/3/131398440/badobazepevuki_maxovibur_xewiwab.pdfIn PDF document text
    • http://nibamafe.sgst-atx.com/uploads/1/3/0/7/130775195/c7873.pdfIn PDF document text
    • http://solavama.phillycleaningpros.com/uploads/1/3/0/8/130814017/nuvinuxex_tikoliv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2148/3687/files/cats_in_the_cradle_lyrics_ugly_kid_joe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7510/3637/files/18211152680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/27198628134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9512/1319/files/30674051658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/nimemibono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac34a21-9293-45d1-b91a-c1b37bfd9f3c/9671390889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21d42d5-820c-49cd-b055-28cda72c0f8f/46535098001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8d54f0-4e14-4722-861b-20117604b7cc/tebegixepase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/156c79c4-80cc-4868-bd41-35ec378780ea/32533652359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d1ef01d-e61a-46f7-97b7-753a74250c6a/30897740935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9499b024-f298-498d-87e0-84abcb667521/24238383795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef212ba-efc4-4a7e-992c-f7ee9d0cbf4a/12403920223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00592fb1-7cbf-4ca2-8f19-cf86d0683606/bitenavud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1004665-dba2-4164-a6d1-85c40bd7f916/49717666765.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_off0000660b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660B 4952 bytes
SHA-256: f8b948e947b556255929cb1272d747dd3ae6a2bcc6442f0a5f7cd496893c9cd0
font_01_sfnt_off000076f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F6 10500 bytes
SHA-256: 0cdcf45291b4e97f0cad0ae7cd1c03a394b5eec12aae6b8e34032479a74f9660

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