Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a1be8853b71aad…

MALICIOUS

PDF

84.6 KB Created: 2020-12-18 12:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6e24e8f697a00c31ced0c31b77a85813 SHA-1: 92406c139691b9a27c3a492ef8b172b6d28c8311 SHA-256: 92a1be8853b71aadee3f4071e9bcb0e9a2e09f0c9fcb2e9a72f832a4612b07ba
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one pointing to a URL associated with movie downloads, suggesting a phishing or malware distribution lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/123?utm_term=hollywood+dual+audio+hd+movies+sites PDF link annotation
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/558ef243d08de1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a900d82-b492-4105-8b60-77a457856f80/96082612096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b1deb5f-7070-4830-8812-4a5d56230ab2/86252767380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/227c790b-4c72-428c-8c36-5e96a43ccf53/across_five_aprils_full_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab26d366-dc9a-45ed-8dcb-9cbd3099e725/xepapul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe099418e72e5fdb9df916/1606289817765/43989728343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15f3cfe-0a1f-4f32-99d0-310a30d58244/secaucus_junction_train_station_schedule.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b7932e34347c70431387/t/5fc15ff13c6ccf69f391910d/1606508530522/atomic_4_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/jotawateputo.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/44410580547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a992f2-b092-4a79-b60a-9ed5a1524743/vusd_calendar_2019_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a4d6db-5d60-4908-bd83-d3ffdece0b2a/nupaveviwogabefatif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86a0b20-6659-44c6-8524-20a908b70044/semupojotixilukuxoxitoxa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc528f2abaecd33183df1a5/t/5fd64fcb89566e781f4c66f6/1607880652343/zojot.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96C 5184 bytes
SHA-256: 7d6fa7c0469839b0e99982f1d47f69a11b8766427aa481a6671942448bab8de9
font_01_sfnt_off00010b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B02 10820 bytes
SHA-256: c39eb18464c09f4fdd906c44bb9e11feb4e2cd496abea1d97fe4711395d70efe
font_02_sfnt_off00013021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13021 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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