Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59027bbf5c9a2ef…

MALICIOUS

PDF

78.4 KB Created: 2021-09-10 02:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 6febea5ee0fa19d679928940e34872a5 SHA-1: 60de0be2a08812dca6606bccadf56cbdf011ed76 SHA-256: e59027bbf5c9a2eff3b20d8bec695632650b8bfe5160f07a398459b9982cd86a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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 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
  • 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 http://hvezda-pardubice.cz/files/file/79208014810.pdf In PDF document text
    • http://travellerisland.com/files/79955739065.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161324b3d554b3---6007368527.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/kederagajenorilin.pdfIn PDF document text
    • https://subarini.ro/mm/file/dejojazurutosoxaretom.pdfIn PDF document text
    • http://zenithmetals.com/files/xowadeda.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/81350634187.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/6867613784.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/vutowe.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/1427662500.pdfIn PDF document text
    • https://forumsevens.com/images/file/693973155.pdfIn PDF document text
    • http://t-groupvnxkld.com/uploads/news_file/wudejazelonilosotu.pdfIn PDF document text
    • https://spacio.hk/attachment/file/21069938073.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/zijizesilimopos.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/70740444528.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/pezigomatomotiwozigiso.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/82698954759.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/xofaxoj.pdfIn PDF document text
    • https://swiz.eu/files/editor/futadawudonafidud.pdfIn PDF document text
    • http://hunicorn.hu/userfiles/file/pafibej.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/72726102436.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/xekamijituxaxozuxe.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161353fded0d86---velapibekukusi.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/murejolatib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=something+has+to+break+kierra+sheard+lyricsPDF link annotation
    • 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://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_off0000c900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC900 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE117 11240 bytes
SHA-256: 834d5dc13e4dc48708b430db6e254adc98503e28dccae225efa7bfef831ada3e
font_02_sfnt_off0000fb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB07 18764 bytes
SHA-256: 3a0cbcfb74a618c9f6cca00be70b074788bfaf0c3696410176ef835dd1f73dc6

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