Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f7b7cd157238a7…

MALICIOUS

PDF

71.0 KB Created: 2020-11-25 09:34:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: 9c1f38ca5d8159061330794f7e5d3fe5 SHA-1: b382c857366fea93a3178cebf241cd23ba3dd918 SHA-256: a4f7b7cd157238a78f78c8380d667231c7fab6f78d2e863199adad9cb8deed1c
196 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
  • 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.
  • 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://trafftec.ru/strik?utm_term=work+energy+calculations+answer+key PDF link annotation
    • https://muxalogedidu.weebly.com/uploads/1/3/4/3/134358485/fevarajeboxexab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5fa1f8aa1e9fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5fb28d8366236.pdfIn PDF document text
    • https://vezerovir.weebly.com/uploads/1/3/4/5/134580053/poxuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500440/normal_5fbdb6d19b241.pdfIn PDF document text
    • https://wubaruduxosekur.weebly.com/uploads/1/3/4/4/134484821/xarizuguteza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_5fae1632dc640.pdfIn PDF document text
    • https://fukubumo.weebly.com/uploads/1/3/4/0/134016705/de54bd62.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000cdd7.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000cdd7.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0001012d.bin)
    • https://uploads.strikinglycdn.com/files/8f6fbbf2-242f-40e0-9f51-e03cce658a31/72119218676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb59a0f-d702-4c96-bba6-c6fff1226bc9/bodiwedogadefopozubim.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/mifejumotavaluwerulavutol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb9b2fc-f6e0-431b-bb9d-16ed36eae0e1/43383730845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed282656-f8b4-46da-ab3e-40b3dcb26ccc/historia_de_la_odontologia_en_mexico.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_off0000cdd7.bin)

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD7 5120 bytes
SHA-256: 292f3ae2edc18c5ba620f051036c5721a6e43a000b417d6adab2c2ac421c8a3e
font_01_sfnt_off0000df70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF70 9832 bytes
SHA-256: 51d6eb08de9d2fb8684f8a3dec1036d073ddd72e1539590931153feab0270dba
font_02_sfnt_off0001012d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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