Malicious PDF — malware analysis report

Static analysis result for SHA-256 a553867de9cdb817…

MALICIOUS

PDF

41.7 KB Created: 2020-11-08 21:35:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 652d38d67df9abc2b14be3ff0df06e0f SHA-1: 7a6c96df4a73f603534b4e0d4bd2bc13466a0630 SHA-256: a553867de9cdb8170b820d06830bc5e4aad5b0f1668f25871e4cbfbe932fc486
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafficel.ru/aws?keyword=nickelodeon+logo+history PDF link annotation
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/7249273.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/vevimi-zamijepuxikuzab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443356/normal_5fa825236c651.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tafelataxuka.files.wordpress.com/2020/11/ligalumabisepinidin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f01b9f9-2b57-47e1-add8-88e16fceb4c6/onlinecom_free_casino_games_slotomania.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48a8d62-920f-45af-aa66-c10cc4bc985e/dead_rivals_apk_uptodown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a09c456-e005-47ce-95c7-e487481016b6/opera_omnia_reroll_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/att_uverse_packages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2197f694-65ec-4a51-a61a-15b6af4f52a9/rinivevomejepom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc958e65-391a-4dd2-b670-7f2945a33654/bulamaluxid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e5a8d40-80cb-478d-adff-4b3dcadcab04/fnaf_3_free_games_online.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_off00006392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6392 5124 bytes
SHA-256: f84f3bebaf2ba9e73ac0bc8edc7fad364cb11c25c617c96b671fe0f0f27dddcc
font_01_sfnt_off0000750e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x750E 11020 bytes
SHA-256: b9f307be72669fc732dbf9ed50446f1b7e9afdad68984138e8e680209fb73680