Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80e35ff305c50c3…

MALICIOUS

PDF

110.2 KB Created: 2021-09-20 18:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7fed16d920c2ebdd3a8845cc248dbd1e SHA-1: 61030dcbee91c36b13c508f7b6d2de8a3ec39215 SHA-256: c80e35ff305c50c3d0e0c73d1071b5e1d85441639dc9b3b15668137186e86498
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a command-line context, a common technique for executing malicious payloads. Numerous external URLs were extracted, suggesting a phishing or redirection attempt to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. 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
  • 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://smidgel.ru/uplcv?utm_term=how+to+create+emulator+in+visual+studio+code PDF link annotation
    • http://deleersnijder-bocaege.be/images/file/totabixewa.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/valexofirasilanez.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/94286567071.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/ilivtsbo91ju69mdvj3vthehbm/sitawame.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/duxagagunekewowek.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1614274e0b7717---80607420842.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/57220349521.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/23852926725.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/44777846457.pdfIn PDF document text
    • http://fullerton.kopanramen.com/uploads/files/mosuradetunurofidogutixe.pdfIn PDF document text
    • http://spad.kr/userData/ebizro_board/file/84019784485.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/50190718957.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4b1397ad1---85366580713.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/xesenanisabobubemamurit.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/937656296.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/fuserofilazujonafetip.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/39531191918.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/80801355228.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/zomamuz.pdfIn PDF document text
    • http://aallergy.netlovestories.com/upload/files/gamamedorodijewesewev.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16141a3e53051e---rurubugewitib.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/92442607450.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/sikusadawobipov.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/dimikisatazexiluv.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/pupizobamupogakegazejeb.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://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_off0001465a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1465A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E71 10776 bytes
SHA-256: d85d5c921a62a69477230adf362ed2a73df45cc24cde005634d3581506668006
font_02_sfnt_off0001773e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1773E 18848 bytes
SHA-256: 406a245953b7f10f7f19d07733f35709aeab247d5181895db7d2a50b2b63afe9