Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c703808196b4a7…

MALICIOUS

PDF

45.8 KB Created: 2020-10-25 13:59:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 2d769e1bca4746124a7c0f7991e7abe8 SHA-1: 17310673f3414d325c16ffb299e38a0b0ec73897 SHA-256: 43c703808196b4a72bb8796411ce1121cafdf867c7bd187729ac818a37e9d40f
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?keyword=bluey+cake+template In PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/3953434.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/devamet-derekaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000066f8.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000066f8.bin)
    • https://uploads.strikinglycdn.com/files/7981467b-4e44-469c-bbb6-1e041157ad79/vugejezovanob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c48354b5-e41f-4e1f-ae17-a8ed2df27afc/mekovaliwuzoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74aefdc6-e5fe-40e3-a1fd-166e34367cc7/69691555089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bd0bfb2-748b-4176-90c5-d516a07b647d/gudabipasenuturi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246075ca-4abf-4394-bdc3-b53a809d02cc/48122789750.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/mitifevinuw.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/bikhre_moti_islamic_book_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/may_2018_calendar_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/light_reflection_and_refraction_class_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bdae5bd-0a9a-4c5b-bec0-2512ff451560/37347652522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4f846a-c451-4fc1-93ef-d2c026661bec/11953819960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c87feb4e-9cfc-4d76-b85c-65a166cab0d0/75482753759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/334bea7d-48a0-49d4-9e62-fe279da4e1b8/as_24_le_mans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93506dd6-8f03-4cee-9fd8-cb7a92caed96/mivominizafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3efc0f36-3533-4796-9477-fa992119e08a/48579934088.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 extracted file (font_00_sfnt_off000066f8.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F8 5020 bytes
SHA-256: 8630c803f7dedc95e52487a83e52258891c2f8c4f206f6787de07f90834bf2e4
font_01_sfnt_off000077ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77FF 3072 bytes
SHA-256: f902110bbb2b2fca33ea9f6cd6307b2699f6495d66474b366b961db212e5df95
font_02_sfnt_off000084a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A3 11168 bytes
SHA-256: a67fbd6fcd0151404dbcef23d9d9efb72258f233b06ed8e0f6b25414157518c8

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