Malicious PDF — malware analysis report

Static analysis result for SHA-256 900eb1daca0111ac…

MALICIOUS

PDF

69.9 KB Created: 2020-11-20 15:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e3318cb196922c833c6d85bd791d277b SHA-1: 92f04d505cf67ae2bad1df43e9dc98b5aa257c1b SHA-256: 900eb1daca0111aca3b28297e5f84796acf920bfe3e3d8d31fc402539d09fd55
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://ggtraff.ru/123?utm_term=8+ball+pool+guideline+hack+apk+anti+ban In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470696/normal_5fb6a680c6e36.pdfIn PDF document text
    • https://jederatikepu.weebly.com/uploads/1/3/4/3/134370591/de7bba1.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/e406fc56-a1c5-43de-8d82-2e9e6b7eaf53/map_of_pokemon_heartgold.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/16276980913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8de8f4a-b82c-4bcc-9aa9-8b4061001ba5/a_perfect_life_by_danielle_steel.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/find_server_id_discord.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5feb5af-0a32-4ee8-8397-b37002dcd4d4/piganuferovodebuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98583961-7dde-44c9-bde6-17f84d2c73d6/39165893444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0992cf52-ace2-4082-ae94-2054980d738c/760_area_code_state_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cbc29f8-ea34-4173-b82b-8ea44371ca16/windows_10_amazon_drive_app_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d76554-8e0e-4698-b977-538807d5a2ea/edgar_payne_composition_book.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_off0000d4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BC 5364 bytes
SHA-256: 1ffb11c11bbcf014a7e1c5d72799927b21287ac5afa32f936b5093a2ba18cb6a
font_01_sfnt_off0000e6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F0 10556 bytes
SHA-256: bb1f24ae15c86885786d9026b01942b1a1a35dc11fd25cce2e0499d38034ea2a