Malicious PDF — malware analysis report

Static analysis result for SHA-256 921abf3eb83b2022…

MALICIOUS

PDF

65.5 KB Created: 2020-12-17 04:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 13ed8b4a15a3d33938ba8a710cca99b2 SHA-1: 7daff5c9c8f784d174aaa856237c56f37faf0e50 SHA-256: 921abf3eb83b20229d58cc3422fee6732e02e5f08fc5a228d0839a417eda551a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?utm_term=already+yet+present+perfect+pdf PDF link annotation
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/9746475.pdfIn PDF document text
    • https://zadavutuni.weebly.com/uploads/1/3/4/3/134343582/ramakuseg.pdfIn PDF document text
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/vijojawi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitatotol/indirect_object_worksheets_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/338c0b81-d532-462a-88f3-2378890b4ff8/de_lo_peor_lo_mejor_auronplay_descar.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/85680463389.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/12590313300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0741a41b-d37a-4d42-bbe3-6897ee30fe43/46822885755.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/lepixifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a46d5c2a-3b2c-41c4-b94b-187fd4bb3236/coin_master_free_coins_and_spins_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d976280-ae9b-4d34-bc9d-9383e7922939/default_app_manager_pro_4.0_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee7758c-18f3-4e8c-99a9-a38f6be585f7/94947399852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d950fe6d-e1e3-4c99-a53c-6dfa3ba2c514/tatung_rice_cooker_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/amazon_prime_films_to_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8026f4fc-bbbc-41f1-a1fd-c1e48880dda3/jewazumewafe.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_off0000c490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC490 5240 bytes
SHA-256: 83c4e866dc3e37662751a9adf39b4f5c11de0e04b8e2288c09cba72b0b8b8eae
font_01_sfnt_off0000d67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67B 10116 bytes
SHA-256: 343fa361fa81d41a21e2896b7a1e7e2a7cbdf584a22efd10b1c0d1d64f02e5f4

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