Malicious PDF — malware analysis report

Static analysis result for SHA-256 0485213f11b83a25…

MALICIOUS

PDF

82.5 KB Created: 2021-09-12 08:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4fcd50f97b88253621c9fc14bbab8146 SHA-1: 5076286644e142f8ef47bda8f6b1399670bba153 SHA-256: 0485213f11b83a253397b08d872973a4df345447a72b8959cf2caf0d7317e04e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF document was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs and exhibits characteristics of a link farm. Crucially, it includes a 'Clipboard command execution lure', instructing the user to copy and paste content into a shell, which is a common technique for executing malicious commands or downloading further payloads. The presence of multiple unknown URLs suggests potential distribution or command-and-control infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/a907d9c214934c7699a79cb94b4233ac/97006415673.pdf In PDF document text
    • http://artecgroupservices.com/imagenes/file/11355691367.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/12002095645.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/basisokebetatigar.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7d90c72a3---64778599523.pdfIn PDF document text
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/nagasunasarobiz.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/76922388107.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210904131321.pdfIn PDF document text
    • http://hwangtosidae.com/userData/ebizro_board/file/fugefomifilovumi.pdfIn PDF document text
    • http://sfipl.in/userfiles/file/80444983097.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210912123528.pdfIn PDF document text
    • http://infosierra.es/images/editor/87999201231.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/vitakenibozuruveranivewub.pdfIn PDF document text
    • http://chafewyuok.handysociality.com/upload/files/pelut.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/18948336244.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/zefixezadewabese.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/46997232187.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/lukozidizere.pdfIn PDF document text
    • https://newfrio.com/userfiles/files/piretizureras.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/wolivadisotugi.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/xujuxedekomi.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/kapusovatitipivaje.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/797528169.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/kumilejesakiwomoxeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=mobdro+install+on+smart+tvPDF 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_off0000dda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA9 17928 bytes
SHA-256: 53834ac9e6a5982252b4f8a18dd524a8719b0d3c86b3eae3c9556a7d03d03277
font_01_sfnt_off00010cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFD 10476 bytes
SHA-256: 50597529bc2bd26e174c47ba4443b96ace558e707adf4f3b6c152d939285c623
font_02_sfnt_off000124c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1