Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c8ca11699864764…

MALICIOUS

PDF

44.7 KB Created: 2020-11-07 02:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 1439431e767d2cf3f9fc30369e2a9ea9 SHA-1: 159f2c86e48ab63b4c038b967e1a6bc186d26741 SHA-256: 8c8ca11699864764cddd9f4b58c43380a7be4c7ccbafaf1e4b33b995e3315c50
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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?keyword=natural+gas+calculations+worksheet PDF link annotation
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/xiped_tiparelazelu_bofugefunu.pdfIn PDF document text
    • https://gowosupene.weebly.com/uploads/1/3/4/4/134489802/90e4486f9.pdfIn PDF document text
    • https://wusunipusu.weebly.com/uploads/1/3/4/3/134320006/fiditokazonasimi.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/nodiponibozu.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/bb353648-c199-4dc5-92fe-3c5240212aa0/tantric_massage_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/10853216875.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/satellite_city_hall_wahiawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1a14f3e-85bc-428a-892b-11c54d8a85e0/79530941185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84740516-9f26-4eee-ba5d-396fff0dc324/rochester_minnesota_phone_directory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bc98ba0-ecd6-42e2-921a-02eeafc56323/best_dog_shampoo_walmart.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4E 5184 bytes
SHA-256: a389e80481277e1ad637a63eddd20d253405de10bfb2bbe3941d3a02c8a20afb
font_01_sfnt_off00006e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E04 10044 bytes
SHA-256: 22d79dffeb185c16f7d723268cf5e2f05d710847c1f73a177dc4d7cfe2153cf9
font_02_sfnt_off0000905d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905D 16152 bytes
SHA-256: 107dd7461bad0ee7f69ec232d7edbfa51533cbe03462e0930b0bd999c9024e27