Malicious PDF — malware analysis report

Static analysis result for SHA-256 1449da3f8cfad973…

MALICIOUS

PDF

82.5 KB Created: 2021-09-10 13:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a17fe16d10a992210e8fd6cf5bcf02b3 SHA-1: 5023851ecff12a8ec839e55f6f2090f86c9faf69 SHA-256: 1449da3f8cfad973d6510beb6c31f49c9820eb30b9fda58acae8d8cd95ca2999
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier as malicious and also detected by ClamAV as a phishing trojan. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs the user to copy and paste content into a command-line context, a common technique for executing malicious code. Several URLs were extracted, some pointing to compromised websites, suggesting a potential download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://alconsprom.ru/ckfinder/userfiles/files/bixivapedobudade.pdf In PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/bajalozidutopuwog.pdfIn PDF document text
    • http://thefarmatarapahoecounty.com/userimages/vuwizu.pdfIn PDF document text
    • http://koddous.com/userfiles/file/mumegokonugeputavonamo.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131436ae58d7---71660317808.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/72119120293.pdfIn PDF document text
    • https://nepalonlineexam.tisaracademy.com/userfiles/files/42486361780.pdfIn PDF document text
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/95296442087.pdfIn PDF document text
    • http://thaymanhinhlaptop.com/userfiles/file/wanisidavetijuru.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/penepexozupodizi.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/litado.pdfIn PDF document text
    • http://venkateshservices.com/uploads/53510649338.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f41239ed65---37829821583.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16137edaa492e9---muzaponibiravexudaligerak.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/iuhinm0cl6qtucki2p97com7oe/82785008133.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/xiginoni.pdfIn PDF document text
    • http://fpole.ru/sadm_files/76141442837.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/wexilidisuxetaxekogikod.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-8/20210908010217969486.pdfIn PDF document text
    • http://hzqljsj.com/images/upload/File/tusovipojorosijikajot.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/85717376029.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/xararilebugeta.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/kaxel.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/24397545124.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=transferir+contactos+android+a+iosPDF 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_off0000dde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F5 18260 bytes
SHA-256: e6d851d9eca4f5dfea0961277bdbd4386639eb9f3434fa3e107c05e6b1fb7320
font_02_sfnt_off00012501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12501 10388 bytes
SHA-256: 6f8d4a13c40a0f897b7ba565a1adc92b6b83b0893e34626e8006abcfbc5dbf85