Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe7b4ba53ac2c9a…

MALICIOUS

PDF

129.7 KB Created: 2022-06-07 13:03:42 +02:00 Authoring application: trisdel (via PDF Master 1.0.1) First seen: 2026-04-24
MD5: 1a44f7501cd69c732a5f20c168fdf980 SHA-1: 45815cc8f9374f121176fe6e90863e196ade2d7c SHA-256: cbe7b4ba53ac2c9af761e345cf0b081b9e6910ec1c6c6fdfa946e780ed1e060a
264 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0011

Heuristics 8

  • 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.
  • Cracked-software lure uses shortlink/download gateway critical PDF_CRACKED_SOFTWARE_SHORTLINK_LURE
    PDF visible text advertises a crack, serial number, archive, or pirated-software download and pairs it with a shortlink or encoded download gateway. This is a high-confidence social-engineering carrier for unwanted software or droppers; the PDF itself is not a parser exploit.
  • Cracked-software lure uses download-gateway redirectors high PDF_CRACKED_SOFTWARE_REDIRECTOR_LINK_FARM
    PDF contains multiple cracked-software/keygen/serial-key lure links together with long encoded download-gateway URLs or known crack-download redirector hosts. This is stronger than generic piracy vocabulary: the document is an SEO lure that funnels users through redirect/download infrastructure commonly used for adware, unwanted software, or droppers.
  • PDF links to a cracked-software download doorway (base64-obfuscated) high PDF_CRACKED_SOFTWARE_DOWNLOAD_DOORWAY
    PDF's embedded link hides a pirated-software title as a base64 blob inside the URL path/query (and/or carries the ``download|`` doorway-template marker), rather than in visible text. This is a TCPDF-generated SEO doorway that ranks for software-piracy searches and funnels users to fake 'crack/keygen' download pages distributing adware, potentially-unwanted programs, or droppers. The base64 encoding is deliberate obfuscation to evade plaintext lure rules; the PDF itself carries no parser exploit — the risk is the linked crack-download destination.
  • PDF link farm advertises cracked/pirated software medium PDF_CRACKED_SOFTWARE_LURE
    PDF contains many clickable links whose targets use cracked-software, keygen, serial-key, or warez vocabulary. These are SEO-spam lure documents that rank for software-piracy searches and route users to fake 'crack' download pages distributing potentially-unwanted programs, adware, or droppers. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://evacdir.com/internship/?faiza=QXV0b0NBRAQXV&guard=&ZG93bmxvYWR8dlkwTVdOemJueDhNVFkxTkRVNU56VTBNWHg4TWpVNU1IeDhLRTBwSUZkdmNtUndjbVZ6Y3lCYldFMU1VbEJESUZZeUlGQkVSbDA=jind&kroyer= PDF link annotation
    • https://www.praxisforum-online.de/wp-content/uploads/2022/06/neepati.pdfIn PDF document text
    • https://gardenstatecomedyclub.com/autocad-crack-download-final-2022/In PDF document text
    • https://nutrition-children.com/wp-content/uploads/2022/06/nersyl.pdfIn PDF document text
    • http://theartdistrictdirectory.org/wp-content/uploads/2022/06/AutoCAD-1.pdfIn PDF document text
    • https://professionalcookingtips.com/wp-content/uploads/2022/06/AutoCAD-8.pdfIn PDF document text
    • http://goldenhome.info/2022/06/07/autocad-19-1-crack-license-key-mac-win/In PDF document text
    • https://oregonflora.org/checklists/checklist.php?clid=19302In PDF document text
    • http://fasbest.com/?p=24979In PDF document text
    • https://lindamarionparker.com/wp-content/uploads/2022/06/geotomm.pdfIn PDF document text
    • https://bryophyteportal.org/portal/checklists/checklist.php?clid=11942In PDF document text
    • http://www.theoldgeneralstorehwy27.com/autocad-for-pc/In PDF document text
    • https://fraenkische-rezepte.com/autocad-20-1-crack-with-license-code-download-for-pc-final-2022/In PDF document text
    • https://inobee.com/upload/files/2022/06/vytZuVZsAxcSLPDvCl3J_07_5da4cb309097474d2f941c1b46a3587d_file.pdfIn PDF document text
    • https://www.neherbaria.org/portal/checklists/checklist.php?clid=13052In PDF document text
    • http://monloff.com/?p=13950In PDF document text
    • https://cryptobizworld.news/autocad-newest/In PDF document text
    • https://szklanepulapki.pl/wp-content/uploads/2022/06/AutoCAD-4.pdfIn PDF document text
    • https://captainseduction.fr/autocad-2020-23-1-crack-with-license-key-download-mac-win/In PDF document text
    • https://plainbusiness.net/?p=27690In PDF document text
    • http://www.chandabags.com/wp-content/uploads/2022/06/badblad.pdfIn PDF document text
    • http://evacdir.com/internship/?faiza=qxv0b0nbraqxv&guard=&zg93bmxvywr8dlkwtvdoemjuedhnvfkxtkrvnu56vtbnwhg4twpvnu1iedhlrtbwsuzkdmntundjbvz6y3lcyldfmu1vbejesuzzeulgqkvsbda=jind&kroyer=In PDF document text
    • http://www.tcpdf.orgIn 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/xap/1.0/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://www.aiim.org/pdfa/ns/extension/In PDF document text
    • http://www.aiim.org/pdfa/ns/schema#In PDF document text
    • http://www.aiim.org/pdfa/ns/property#In PDF document text
    • http://www.aiim.org/pdfa/ns/id/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000029ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x29ED 120140 bytes
SHA-256: a217f12862e0ff75203bdd4136ca0d68471050be46bb09aed5306898926ffdd4
font_01_sfnt_off0000d7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D0 76772 bytes
SHA-256: 07ce6fea3c98bf59133021be55ce9147f9c26365efe580a2a4f82130ca697f54