Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf8d96507a68e73…

MALICIOUS

PDF

42.0 KB Created: 2020-10-09 01:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: fc4ed90c177d98c4f10cd0a96c432f2d SHA-1: 76d1800eed48d214860c587957829ff37d48776c SHA-256: 3cf8d96507a68e73b9922e24f0d1165a7f197bed81c52955d12527b90abe45ad
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://gettraff.ru/strik?keyword=fitssystemwindows+not+working+android In PDF document text
    • http://files.athensupc.com/uploads/1/3/1/4/131438162/61dbd.pdfIn PDF document text
    • http://vojezev.icm-basel.ch/uploads/1/3/1/3/131379406/a7b6b5f.pdfIn PDF document text
    • http://files.dirtylittleclaws.com/uploads/1/3/1/3/131380895/255238b565da9.pdfIn PDF document text
    • http://files.letsbthechange.com/uploads/1/3/1/4/131438195/9b4f358.pdfIn PDF document text
    • http://files.amyplanttherapy.com/uploads/1/3/1/3/131383333/03679f41271c0a.pdfIn PDF document text
    • https://site-1043939.mozfiles.com/files/1043939/lojesokare.pdfIn PDF document text
    • https://site-1043759.mozfiles.com/files/1043759/15691784738.pdfIn PDF document text
    • https://site-1042510.mozfiles.com/files/1042510/39905676726.pdfIn PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/pasijedevar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2313/3604/files/ford_mission_statement_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9270/0062/files/buwuzezeramituboju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8846/5051/files/fibowoboleragi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3951/5039/files/damizeronidisuxola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/70802153861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5957/5958/files/23379144790.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6615 5324 bytes
SHA-256: 4718c824cbd81a0e84b87e0582dd2dc561a1fe1780105f7c430311f10f0a32b1
font_01_sfnt_off00007838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7838 10284 bytes
SHA-256: 186c941a1ab915e667d68b0ce18ef36bdb0bfbdcfb5dfc5efc782fe19e9f4657

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