Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc17e1a95a874e5…

MALICIOUS

PDF

41.6 KB Created: 2020-11-05 10:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 808f84ef2920e09a9e6273cbd93247ae SHA-1: 61848912cad392713c1f556f60d7fae47aa13745 SHA-256: 4dc17e1a95a874e5c17148f80099b87129b425133b38ae6213d2dccd84247855
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.ru/123?keyword=pokemon+ex+cards+images In PDF document text
    • https://koxokigibobov.weebly.com/uploads/1/3/4/6/134600250/dozemo.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/baresis-nejivonepavube-dedefunox.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/ec7783ce-1b2e-4fe6-be25-75be59d1b801/things_fall_apart_vocabulary.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/gta_vice_city_ultimate_cheats_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d75299-4bb6-4f11-98f5-0292348032f1/rosetta_stone_answer_key_french.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1bb1728-ef93-4e19-bae4-81e0a0720e7f/virosomupesavefuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d812aa05-4bcd-47a8-8838-2d573aad6369/fadijanokoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a353598f-79dd-4702-a54f-a0b10950855a/38263924926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1238ac11-846d-4231-8627-2985bc8f2ace/skachat_mp3_i_can_fly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/726f4f0e-1655-4295-a597-76ad562fe814/59341865075.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/92383902516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca2fef09-eebe-46da-860a-1bd8fb9b34b3/dmv_oregon_driving_manual_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e62b9a-3686-471f-9f32-ef57c0d0f2fc/tizibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66848f66-1d1a-4861-a848-b8273b2c9623/concepto_de_salud_segun_autores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab27cc7-2296-4283-8c7f-3d03cc0a066b/lemefobun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a45966af-360c-4c9e-ad4c-ad61e26ea424/samsung_syncmaster_sa550_technische.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_off0000546e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x546E 5068 bytes
SHA-256: 85bdb18db5591d76bfdd9cd7329060f52f1f8947c90af55333f2548a1d6706c1
font_01_sfnt_off00006584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6584 10524 bytes
SHA-256: 08d2fbcd0197041cebe3fd23cd0d5a10094e02f8278d1825cf2298e61d3774b6
font_02_sfnt_off0000895e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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