Malicious PDF — malware analysis report

Static analysis result for SHA-256 c840d027660d2336…

MALICIOUS

PDF

46.6 KB Created: 2020-10-02 04:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: d7bda348c640b4358e4f140094b602cb SHA-1: e4a18426ba855f6bcbc7562838226fbeb50e2446 SHA-256: c840d027660d2336fa463770fc15e4a92eefafdc36e4f54da15f9c3d83c0da87
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=te+amo+pero+soy+feliz+sin+ti+jaime+j In PDF document text
    • http://files.baremedispa.com/uploads/1/3/0/7/130775974/japudufoboxewavinek.pdfIn PDF document text
    • http://files.enriquegonzalesdesign.com/uploads/1/3/0/8/130873916/butejaxota.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/41b8e4af-cdfa-43d8-acda-ba528d5990d1/lizuzuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6622914a-c47d-485f-8bdd-04c53c77019d/dadejapukaligeniwufav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/258966be-7981-4c68-9b0e-8cdc85a634bb/juseporejewuxiweroj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ba3683-5a0f-4f1c-9fdd-5d902b37f5ef/28384100548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36fd01af-a7dd-4d72-bbcf-4f00b9fcb89a/68056148333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/447f3fab-78c2-4ce7-836d-8f4a97e4d83e/pojabokajesakapez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/301248eb-b1ab-4fe6-8d1f-d6e91463a897/863931947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10b1bf9-a64c-46b8-96a8-850e5bd79fb0/33180056136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3749/9302/files/arroz_con_leche_peruano_sin_leche_condensada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/a_raisin_in_the_sun_book_cover.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8042/1018/files/tawelalowe.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

Related samples 4

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_off00006819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6819 5012 bytes
SHA-256: 07f10752fdaeacb383626f2a45ebaf9837130d2782941d9d170398c3d67b3711
font_01_sfnt_off00007919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7919 11392 bytes
SHA-256: 9766ac8dc10cb6dbd002e476e79cc90f49963fbb2c6774213518dd25222351b4
font_02_sfnt_off00009e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E12 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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