Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4dc07ae1e4f6136…

MALICIOUS

PDF

58.0 KB Created: 2020-11-08 12:01:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 9926b6df8105b21b7108d007a04ce23a SHA-1: cd0633bdbbec2cb88937486aeb917bd7157e6c73 SHA-256: d4dc07ae1e4f6136e7f625457f0abaab48dd415a9476b28671c71e06127e664f
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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://traffking.ru/aws?keyword=minecraft+apk+1130 In PDF document text
    • https://dowikonusinewe.weebly.com/uploads/1/3/4/3/134374018/a3cbae8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc19f1b-3398-46ae-b66b-dbcdc91a288f/ninulinejovozezeronexado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ad79a6-d72a-4ee3-afe0-c0f9294eb48c/pokemon_phoenix_rising_rom_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e3c65b-e9b5-4f23-a3a8-db1f3ab9b2a1/44926993345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c1128d7-0ddd-4ae6-b397-f8a77a60a994/5497952921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d69db653-7661-46e3-9b68-05b57d8588be/54706369364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34695dc-6e36-4e61-bab8-388ce154008f/43886188948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783bdc69-6232-4c65-81cd-6a3dfef5838a/93878872722.pdfIn PDF document text
    • https://jerutubovoju.files.wordpress.com/2020/11/shou_tv_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8990830-9b27-45a2-91a7-fc123b3b8ef3/69765673117.pdfIn PDF document text
    • https://xokidat.files.wordpress.com/2020/11/automotive_service_inspection_maintenance_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/castle_crush_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d58979d-f8c4-4b9b-aa0c-d9d5da42a323/pajukutavagisajawexukata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35590167-9d24-44f1-9326-562a12ba5162/28735496228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99fe549-e4b3-4bf9-a7b5-d3072858fd95/fofaz.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7020 2904 bytes
SHA-256: ac34adbcd1652607a4686db67f66d9c539bd8c97258d128098fd3d4f446e0878
font_01_sfnt_off00007a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7E 5224 bytes
SHA-256: 4b9ef810f027c4b9a35d4f5e2a106cf0f0f053f90a1147ee07b58b4f4d90c3d3
font_02_sfnt_off00008c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C61 5812 bytes
SHA-256: cd0f4459de52dfd6ad42251c6369362a9af6018fafeec65dcaeb8cee15515f08
font_03_sfnt_off00009af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF8 12440 bytes
SHA-256: 0b344c4266208461b61ec466dcef8f62a4202aa20475bc5dbbb5fdebc3f023b6
font_04_sfnt_off0000c2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2ED 16756 bytes
SHA-256: 664f31d0a18c54ac4b62592b9858c5ea30f2e895a64cd06ebb5df8000d0132c3