Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c78c646d2a11fb…

MALICIOUS

PDF

40.3 KB Created: 2020-11-08 10:51:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 64be983e02b57f3028dcef44768786ee SHA-1: 42db6f510a0c2489d632b247cbc0683f115b6a53 SHA-256: 84c78c646d2a11fb3d132b88b2b4c0de941ade6dc878a3167f575e52d3a6c8c2
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=daemon+tools+cracked PDF link annotation
    • https://zeburunonuf.weebly.com/uploads/1/3/4/4/134458398/c122f2ede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f86fa16347a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5f8fb7ff851d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f8b163dac9f2.pdfIn PDF document text
    • https://zupawifotifawe.weebly.com/uploads/1/3/4/4/134480263/gafepuwuresez.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/68d153b8-cad5-4ea5-acab-d8ca5437aa5f/rowuxelo.pdfIn PDF document text
    • https://podenujo.files.wordpress.com/2020/11/bekonagajimifujegidozoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d330cb0-fdf6-45b7-abf7-bc7dd67caa45/95504584650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e71fc20-0897-4756-bdaa-3e79e3a41e2e/viremixem.pdfIn PDF document text
    • https://padirevok.files.wordpress.com/2020/11/nemir.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/413e711a-8cb3-4a50-b8ca-c73e100a048b/fudesunizoruratejozow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14d21f1-4449-446e-894f-ac2a6459d694/woropogudutefeparodokimi.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_off00005f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8B 5148 bytes
SHA-256: 01aa637f7c1cd4b2aaf6e871f19e7692f9501c7bf9ddd6ef74db2bbd1a87a449
font_01_sfnt_off000070fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FD 10376 bytes
SHA-256: 91bd36bba85c216361a4e9c10bd1109cf38619c000b1634c5d094f7cf9e856b8