Malicious PDF — malware analysis report

Static analysis result for SHA-256 9adce4bc2f83440d…

MALICIOUS

PDF

112.5 KB Created: 2020-11-22 15:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-20
MD5: a82c460a961c186f02207e1eaa053c51 SHA-1: c61d87ce9c2e28016682b0ea41ce2d9449a1c94d SHA-256: 9adce4bc2f83440d7f7b0c83e450ad57c6f87e8e4abf58601a8bd25d374e269d
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document uses a lure related to FAA drone pilot license study guides to encourage users to click on embedded links. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are likely malicious or lead to malicious content, as also suggested by the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings. The embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/wb?keyword=faa%20drone%20pilot%20license%20study%20guide PDF link annotation
    • https://s3.amazonaws.com/vidadaviwal/80364790772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5f926f231eb77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486041/normal_5fb8b74d21f75.pdfIn PDF document text
    • https://fomikozifu.weebly.com/uploads/1/3/4/5/134511133/7573be.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/sikuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384154/normal_5fb43564bc4e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_5fa958bbb0985.pdfIn PDF document text
    • https://kazajiti.weebly.com/uploads/1/3/4/4/134456981/ce3e768f152f9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5f8eb240e605e.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00017b61.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00017b61.bin)
    • https://uploads.strikinglycdn.com/files/1023970a-728e-48c5-90de-441f6eaf51b5/suwaxukizemomozuluzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f51de82-95e5-4620-958f-1ae322c169f5/16506753356.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_off00017b61.bin)

Related samples 4

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_off00017b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B61 5296 bytes
SHA-256: e920614c8b97d70dc5a891120861a736e3e94831fb316a40c086cd23f8ff0098
font_01_sfnt_off00018d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D81 11592 bytes
SHA-256: 2f07e943db4b916e3ceb440cc96230c3de2454a69457ca9ff11a6555c27ecf61

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