Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd43e40c35ca30d2…

MALICIOUS

PDF

83.8 KB Created: 2021-02-21 21:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0f701e5763e0fb918f70c0ea0d7dcae1 SHA-1: 5cbac989cd16a971f077afbb849bd922fbbb2218 SHA-256: fd43e40c35ca30d23619e4cb25bba89260052ff3b6f4f7a9a52b5d91f396fab2
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cdn.sqhk.co/wugolekufo/fjb4Bji/75864124946.pdf In PDF document text
    • https://cdn.sqhk.co/rerunagakiz/jx3fge7/simple_rhyming_words_list.pdfIn PDF document text
    • https://cdn.sqhk.co/ditutafewaw/OhBReih/digital_marketing_courses_online_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_6010546544273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478398/normal_6009dc1284e0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408588/normal_5fdea7ee2a08c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375196/normal_5ff609cdb79e2.pdfIn PDF document text
    • https://cdn.sqhk.co/bikawegaj/c8iiKgC/word_of_the_day_collins_dictionary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_5fd2ea2368b88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_602baf344000d.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/Whhjagg/mini_boxing_ring_for_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485001/normal_5fe4eb6a19dbf.pdfIn PDF document text
    • https://cdn.sqhk.co/lunexubafexo/zja9gem/random_city_name_generator_dnd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416512/normal_5fe473025781a.pdfIn PDF document text
    • https://leonvi.ru/wb?keyword=fifty%20shades%20freed%20final%20clip%20&%20trailer%20PDF link annotation
    • https://leonvi.ru/wb?keyword=fifty%20shades%20freed%20final%20clip%20&%20trailer%20(2018In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bezutu/86351475783.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_off000108d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D0 5300 bytes
SHA-256: 4777f742aa2feb6e7730fcc142edef2d8f1fc292cd39c9a753674fc64e5da81f
font_01_sfnt_off00011ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE4 11828 bytes
SHA-256: c125d4d0a761181b78d725464e707bdc9f7bbb2c3d9fde7721635970f9bc9494