Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ca78afdab0fcaa…

MALICIOUS

PDF

52.2 KB Created: 2020-11-07 02:22:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 34fcec5c0651368079c251b32787e159 SHA-1: 090620450b1488184177994be90fd22928cc7806 SHA-256: d8ca78afdab0fcaaadc8a82aa68a38eeee5ba2725fa06177e144ab513e8e4e96
116 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://trafffi.ru/aws?keyword=world+conqueror+3+hack+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5f8cafb79cd10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f8ea249f31d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5f9c348ec82b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423136/normal_5f9b04aea1510.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gogajajar.files.wordpress.com/2020/11/48539197016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbe32a44-3a88-4807-ad08-d06d5e24bdd2/kikusijadomoduxiropujus.pdfIn PDF document text
    • https://sopudag.files.wordpress.com/2020/11/wojoborigode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6eaeee9-bb80-414b-bfb1-a060d95d8eae/fofifajanolavegekeboj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb1d796-f449-4e4b-9246-1aa819c78b96/ruwiziwovinekuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5295f6dc-f4af-4717-b95a-154472ffa362/4149441435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a1a8f6-e7ee-4fb1-825c-8bc1b8c72631/werewolf_mod_minecraft_1.12.2.pdfIn PDF document text
    • https://notazit.files.wordpress.com/2020/11/python_para_anlise_de_dados_portugus.pdfIn PDF document text
    • https://tafexoru.files.wordpress.com/2020/11/3294531957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce58c45-033c-42dc-8fef-e2ab817249fe/delivery_driver_uniforms.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6899 6568 bytes
SHA-256: 2ba6e0c4516ae528974428ab90d2fcb845e31fc6427c3681d976df34e50bf0fe
font_01_sfnt_off000078e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E6 5352 bytes
SHA-256: 3e4f862794f43ec9df76a9cce6f0b75e2367cfc0fe44b7e7b24d4b001be407d6
font_02_sfnt_off00008b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1C 10324 bytes
SHA-256: 5b9015cb60c94d4c2fd792b42e60f2c1d78285687573b4a8fca278293b767e08
font_03_sfnt_off0000aeac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEAC 16096 bytes
SHA-256: 2fa4f296fe9e38b1bea2264e65e06c45fbbf4edfcb32b68fd436b1108ab95b01

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