Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7dc29cc7e50a19d…

MALICIOUS

PDF

50.9 KB Created: 2020-11-08 22:19:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: e0c8d615086977f2f9d537c5a270ed83 SHA-1: 2595804588e24dd078454d38ec26e71267fb2794 SHA-256: d7dc29cc7e50a19ddea11e21bdabc0c0cc98683f39921603c880a6c311201ab5
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?keyword=rush+exam+pocus In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5f9d8a513289e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_5fa820c9b75ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389080/normal_5f9755ce6ab75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5fa63c63e60bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kenaribik.files.wordpress.com/2020/11/84473681533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ab46ad-0cd5-4e54-a420-9c1f24eabea5/mossyrock_school_district_salary_schedule.pdfIn PDF document text
    • https://wubidexa.files.wordpress.com/2020/11/problemes_de_lleis_dels_gasos.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/59127990329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bada17de-016f-4677-88c9-ccf986ea966e/what_wondrous_love_is_this_lyrics.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_off0000882d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x882D 5120 bytes
SHA-256: 70041752dfcf80380375a04d768ac8672f6801de30c5be9ae4a4571dd91c654a
font_01_sfnt_off0000997c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x997C 11100 bytes
SHA-256: 3b1b5858ab5bd980e9c44a36fec64e2a34c22bd370ba31dfdbabdfd0bf7a7915