Malicious PDF — malware analysis report

Static analysis result for SHA-256 412e6f23b56c2383…

MALICIOUS

PDF

91.6 KB Created: 2021-09-13 14:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ec85ef0df034712abec23bb876631d99 SHA-1: 1c87e664a751ad3b3c4ac68a99f60c8989b69749 SHA-256: 412e6f23b56c2383b1f9fecd576d1c7b320314e2df99131779cb2b19d38760cc
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ML classifiers and ClamAV. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to copy and paste content into a command-line interface, a common social engineering tactic to trick users into executing malicious commands. Several unknown URLs were extracted, suggesting potential download locations for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://litho-and-co.fr/ckeditor/upload/files/zilobefivotuvapepasoros.pdf In PDF document text
    • https://petpetmates.com/files/editor/file/42147378484.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/zilasarabepoxajavozexoji.pdfIn PDF document text
    • http://fourfoods.com/images/files/newofivurovizowuj.pdfIn PDF document text
    • http://baby-daycare.com/uploads/files/202109020454296120.pdfIn PDF document text
    • http://tischtennis-kiel.de/images/file/75676621160.pdfIn PDF document text
    • http://xn--hazrdner-r4a10d.com/alisveris/yollanan_resimler/file/15526934978.pdfIn PDF document text
    • https://yodobashi-church.com/zajifutixedi.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/54112873158.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/99086961952.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/gosigamekaranu.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/98381172218.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/6415363800.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/63276884981.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/30706150418.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/120914472463.pdfIn PDF document text
    • http://happy-land.hu/editor_up/8633807512.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/77497399919.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/renirebaluw.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/98413048111.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/tuduvixude.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210907085616.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/taket.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/tamokimijuxexavasumo.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/soterezafovakotazofu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=android+tv+box+usb+tetheringPDF 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_off0000ff26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11738 18416 bytes
SHA-256: eb3472e1800c1da64c4b0ce89276ead98f295ee17821c85946a6e59e4ad02505
font_02_sfnt_off000146c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C5 10708 bytes
SHA-256: 1c118a2c8b40d4b2bc9344b2964ae8455119d34c5c4390c6e559a08e5bccf966