Malicious PDF — malware analysis report

Static analysis result for SHA-256 4251ddd1b46b276e…

MALICIOUS

PDF

66.9 KB Created: 2020-11-19 15:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-15
MD5: faa2a40b21c62b4b08e2fc909cd3ae1b SHA-1: 4f98c92c330b7f09c8dd84dc9fd78f193b2684c8 SHA-256: 4251ddd1b46b276e9a65bf811250d3f991e5c46697ea6bd0f8521428eacabbd0
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?utm_term=desk+review+form+2006 In PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/1646767.pdfIn PDF document text
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/5cdaf4f2.pdfIn PDF document text
    • https://purusoze.weebly.com/uploads/1/3/4/4/134495244/lopoduzekuvu_nakizilak_gijufunonuz_wazobob.pdfIn PDF document text
    • https://zigifivabukom.weebly.com/uploads/1/3/4/4/134460242/wanixefalul.pdfIn PDF document text
    • https://jiwefirufij.weebly.com/uploads/1/3/4/3/134370204/1430916.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/288d003082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5f9fe22998733.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://s3.amazonaws.com/tuzamada/3965549381.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/guess_the_gif_level_10.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/direct_from_dell_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/63598712004.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/sotoxejeposexikenuwex.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/durawamowarotaletumoneze.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/pamibudi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4D 4916 bytes
SHA-256: 9f1f2d6cdbd342477f16de8eebb099ac307b78438634b3629564766f7d4ab6cf
font_01_sfnt_off0000cf1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1B 10056 bytes
SHA-256: 08253d1dee3283c540fc07cbdcb478c4719e203b3a59d6f5cc6c8bac91e27286
font_02_sfnt_off0000f146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333