Malicious PDF — malware analysis report

Static analysis result for SHA-256 140bc663e3d430dc…

MALICIOUS

PDF

38.7 KB Created: 2020-10-05 04:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: e8cb2f3bf848c281ed18d1a9cdca9224 SHA-1: 304e0a3b49fc49db11926710bce7ebc9d6c7ebbd SHA-256: 140bc663e3d430dc689ec28c65bc0b2dc6b3dce68b7cb672c4d3f666a1e7c623
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=cambrian+period+ep+24+eng+sub In PDF document text
    • http://files.nataliezervou.com/uploads/1/3/0/9/130969097/nupapolu.pdfIn PDF document text
    • http://kukovi.houseofhempobx.com/uploads/1/3/0/8/130874276/zujikizorilejatag.pdfIn PDF document text
    • http://dezoguto.northernpowerpaws.com/uploads/1/3/1/4/131483281/koxukokite.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/9655d929-7273-4d6a-9283-c90646033c3e/85880345243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9210df0-d68d-4327-9ded-1d2991a8b982/dinegomagududikokitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21ebee4-ee68-4371-84d4-cdbb020aa54c/lekara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b895da5-9523-4a1c-990b-644a6564245e/popobimonokejeludotamevow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d44d9cf-badf-478f-a05c-240e8cd65f31/16024850707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b891fe1c-e3c8-4e6e-bf22-bd6b5cd8fb51/99737368641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9811227-ec8a-428e-b507-05b3dc0c12fe/29035942725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2ad352b-539c-47ed-ae1e-399384c7ae5c/nivasoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b32bcc23-a41f-4fb1-b41c-607a4cdc73e2/labexanul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea0090d-1c7f-4fa4-bf38-6d29ed4da199/xixobesup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8059/9702/files/star_wars_battlefront_2_ps2_unlockables.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0182/2875/files/11073173298.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 5

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_off00004dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DBD 3736 bytes
SHA-256: b0d4fa8e06e6997e7b29e71967765f1c410271185e599d24e490d14ba7b7baf8
font_01_sfnt_off00005b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B00 5512 bytes
SHA-256: db098d16c550d8e33a12eef233a3f725d03a2f12a9c6417dba8254b629513974
font_02_sfnt_off00006d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9F 9356 bytes
SHA-256: fb8ddebe22daf2fae69a4bdde7b265599dc166f011733c4444d56d19137f3f79

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