Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af3b601902f3805…

MALICIOUS

PDF

58.6 KB Created: 2020-12-10 14:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 1e1bcc37b9dc9276bcec79181516684d SHA-1: 062962784b5e897d715f644c4985e8f49fb13c60 SHA-256: 4af3b601902f3805563a20a9ef9f34d5c107a45bbdc603d3b29728303d8962a9
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=soal%20olimpiade%20biologi%20sma%20pdf In PDF document text
    • https://suwanozafedo.weebly.com/uploads/1/3/4/5/134587456/zubiveguf-punuzavatimol-sumisesixupol-vumitanopesej.pdfIn PDF document text
    • https://nenuxigibasus.weebly.com/uploads/1/3/4/6/134694542/2983384.pdfIn PDF document text
    • https://kagizorofom.weebly.com/uploads/1/3/4/4/134476017/kegapo.pdfIn PDF document text
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/katole.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/3647509.pdfIn PDF document text
    • https://bujugerevik.weebly.com/uploads/1/3/4/6/134677448/kujotas.pdfIn PDF document text
    • https://selubigal.weebly.com/uploads/1/3/4/5/134518702/fopusavitaju.pdfIn PDF document text
    • https://liforofejot.weebly.com/uploads/1/3/4/3/134350560/a7a7320da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422884/normal_5fa8f334e6331.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc007006609fd0ee78c7004/t/5fc202843570fb44d14980f5/1606550153552/days_of_the_week_flashcards_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ae6a9955c744b5470351/t/5fc5301de6d49a06bb3a8aed/1606758430460/99983791764.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11c6aec917750a3d920aa/t/5fc57c0a6457125654f71299/1606777867252/paper_towns_free_book.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9D3 5508 bytes
SHA-256: 97c4819450bfb1e932c840e68830393c9cebbabe669508f43187f42ead4c0c5e
font_01_sfnt_off0000bc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC77 9780 bytes
SHA-256: b15acc8beb83a95461e28a9d7895026b39996c46bbacdb632df7ebbb7c4a837d

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