Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a88380e31f8ca32…

MALICIOUS

PDF

85.1 KB Created: 2021-06-30 07:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5b5b789a63ce42fcd4e28f40b4d7a25c SHA-1: 07d2e489ad721411a357c1225d67802d1589584a SHA-256: 7a88380e31f8ca32397c278849ca79e17ef8037195b0dbbb6bc395eadadb76ba
244 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate embedded JavaScript and a link farm pointing to compromised CMS uploads, suggesting an attempt to host malicious content or redirect users. Crucially, the document employs social engineering tactics, specifically a 'ClickFix' lure, instructing the user to execute commands in a terminal, likely to download and run a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=generate+pdf+from+asp+net+c%23 PDF link annotation
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/1tgh78mcqkgssm637ejkuspjr4/zuwiref.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/kobekozenigekivusaxip.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ab4f1006a---nujupe.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160abc58f4fdd9---9358911636.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/vanewelakuxorezijug.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/negogapo.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/xovimezotuferesebozijexu.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/f10a6f17f77baaa22f62a3f7da94e05d/95622406686.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16096eb119291c---xaxugezusepura.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/tedekazodiporar.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/9b0e6bd2508231501c59bfe358c85a93/31025026290.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b152b752176---fikodofaxozidokema.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/xusedolezoxaga.pdfIn PDF document text
    • http://paliukenas.lt/i/File/jemamuroraguvemokubafu.pdfIn PDF document text
    • http://boxethai38.comupload/file/gorakelijegisimemiwobopuz.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/cqig5ubkq4iejon47gd374beu2/69445113849.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/e2e5a18b6abf72336b355657d5b89937/97008852363.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0c993b5a9---xiwawolumebut.pdfIn PDF document text
    • http://spoilersmensgolfclub.com/clients/865201/File/sewomofisex.pdfIn PDF document text
    • http://coffee33.ru/archive/file/sokosar.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-6-17/20210617184942187807.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/vojojodew.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_off0000e94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001015f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015F 17432 bytes
SHA-256: c24f74011335ae8d8ec1e37fc95677e39315751fb1d2b3b3eba2754a6c5c92cd
font_02_sfnt_off00012ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF2 10680 bytes
SHA-256: 02f22db6f400b7ae05d5804657a52e3a61c170b8415711e94cb22146bc029cdc

Open this report in the interactive analyzer, or submit your own file for analysis.