Malicious PDF — malware analysis report

Static analysis result for SHA-256 84721b6e8a49b3e3…

MALICIOUS

PDF

76.0 KB Created: 2020-11-11 06:03:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-05
MD5: b34b6411a3abf8ff68716842611992f7 SHA-1: cef443cfa4f5873be152319409202a789ec2fef2 SHA-256: 84721b6e8a49b3e3edf81da536d32450c2e9dc7f0121442df33dae1f0caafe57
294 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Travel-support phone-number stuffing scam high SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • 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/123?keyword=scholarship+award+letter+samples In PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/860328e027448de.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/scrum_a_pocket_guide_a_smart_travel_companion.pdfIn PDF document text
    • https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/fujig-zuwadejexut-jogelamufopas-mesepopumuse.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/befewagarime.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/tom_m_apostol_calculus_vol_1.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/xdm_guide_rod_upgrade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_5fa0004045551.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/53429879986.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/9078787.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/rbi_annual_report_2018-_19.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000ecc3.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000ecc3.bin)
    • https://uploads.strikinglycdn.com/files/010d33ef-9078-48e5-8506-5849cc930af4/80180895224.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_off0000ecc3.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 5508 bytes
SHA-256: 056fc51c321e5892cddee0df5382d93998689fd29e202fd0c3c14bcc66b7f507
font_01_sfnt_off0000ff64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 10532 bytes
SHA-256: 2b91b588fd48a7ec1ff48eced24cef11caebf0e3b39e682396eac3033cf55302