Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabd040072415324…

MALICIOUS

PDF

83.9 KB Created: 2021-01-05 02:44:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2ed1da8312af8cb4cdf71374010e05b4 SHA-1: ea699efe2fc64ff4030700ef78adc61745307ef4 SHA-256: eabd04007241532488b4fccb8aa9f1797e8534731c2b41e354946fe90c63a992
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are to SEO-optimized PDF files, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate malicious intent, specifically related to phishing. While no scripts were directly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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/123?utm_term=single+replacement+reaction+picture+examples PDF link annotation
    • https://cdn.sqhk.co/kewusikata/bfChajc/bodefesibusepojadabija.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/hgjjgfS/the_maze_runner_review_common_sense_media.pdfIn PDF document text
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/7089878.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuneduzib/RMT1O5z/bow_kingdom_come.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/voxazedisula/arignar_anna_photos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35091493-d08c-4138-b164-e380b094dbf0/75219449333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0300e772-a399-4aa5-8193-0f786aba3336/49631520127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7677891c-e841-49cd-9361-6170567c9bb2/manually_upgrade_to_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/84373864088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69f1926a-8b0c-4e8a-9e49-206a8811fbe7/anatomy_and_physiology_lab_practical_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/24327858405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c0163e-d3e1-4d49-ac43-ceae616bd530/9095593477.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70B 5308 bytes
SHA-256: 5da07bca8430e4df9b8528aca56f29fa126cb3bb61f6592dc8c00928a18b0e27
font_01_sfnt_off0000f8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F4 11304 bytes
SHA-256: fdd33de40ce410b51b88d2bf51ce591c2066588546ad6cde7c0a64e5d89dc073
font_02_sfnt_off00011f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6C 16100 bytes
SHA-256: e8be64a599b4775abf69106d1ea2a605297721d8ccc8071fb3d67c702b09cfa6
font_03_sfnt_off00013434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13434 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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