Malicious PDF — malware analysis report

Static analysis result for SHA-256 93667e578aa406d5…

MALICIOUS

PDF

78.1 KB Created: 2021-09-07 23:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 221ca79358c6cf29523dac2c66eeb2bf SHA-1: f44fdede0a5355ec9fddac8d67a9120c42818408 SHA-256: 93667e578aa406d5b89dd3ea80320375d29b62f4961f2a10c0ecb5eaeb9f5f9f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. 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. The presence of numerous links to potentially compromised or disposable hosting sites further supports a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://tasarimak.net/ckfinder/userfiles/files/vopisakip.pdf In PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/cb036abac6766acab6a4f710e5b13faa/45685533122.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/jepudu.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/95782547130.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/14635898378.pdfIn PDF document text
    • http://yuha.be/_files/file/xubixapimupav.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/70408704927.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/nilegazupexalejitu.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/3ff5fa44894ad6b266624cd6a2544f77/25497475319.pdfIn PDF document text
    • https://valerart.com/ckfinder/userfiles/files/dawimeg.pdfIn PDF document text
    • https://petikdaun.com/contents//files/36253709954.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/nuropu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e96893fc4---54026386453.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/22092086806.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/e695e4997fe3e7e79335dcefa186d3a6/fewemonipuxij.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/3gepql7ee1faap7amgqo3orq05/31295475983.pdfIn PDF document text
    • http://parentini.it/userfiles/files/watovumij.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/salowukekedekulirowamosa.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/bf89865e65e1360a6ed9cddfcc48de3a/4531927250.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7486cb0f42---25428137431.pdfIn PDF document text
    • https://ms02bet.com/contents//files/35929713093.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/vimidosotoziwajubaso.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/cc3a9e348850acd0f5778798d4a636d8/rutisopafif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=descargar+numeros+romanos+pdfPDF 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_off0000c8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CE 10828 bytes
SHA-256: 7d368600507368be5b5bf8ee292e2ef742b33f94f6ba09ac380cbe519671532a
font_01_sfnt_off0000e191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE191 19340 bytes
SHA-256: d63914a10023ec2a045a323f4f20af53ad1be578b53185712779b855ad2f62e6
font_02_sfnt_off000112a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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