Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c866deaa1d4d69…

MALICIOUS

PDF

115.3 KB Created: 2021-07-03 13:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 74b03d353989b21c8a0147a3fad135c2 SHA-1: bb3d8ed086a4800453bc0bcdd398a5d126a44a00 SHA-256: 42c866deaa1d4d6937595ea18012152cfa8cc50471c3256fff14caab0c84b5cd
204 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. 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 technique for executing malicious code. The numerous PDF link farm heuristics suggest the document is part of a larger infrastructure designed to host and distribute malicious files, potentially leading to a second-stage payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609845a4d3b5b---33950580345.pdf In PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1c1dd238e---14490407802.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752c3902536---74628158590.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/befulixupij.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/61892048603.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/ik447nsrm34lkpqok4qc4rbsh3/1557473616.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/sonifofupagitetodul.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a23083f906---85140560692.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3ecce90a7---16935628889.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/xerinaz.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/kamivamawugemulawulibiro.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/ximilubopob.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c64b4ee4c99---76044814796.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ba9e4eb42---rafalamenaduvusulisawow.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086e35f28b35---88467407221.pdfIn PDF document text
    • https://emmaushuis.org/pages/tujavekovavo.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/kirukufelu.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8517d3484c---29205993120.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/69273023420.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085946cbbbb8---wemusefopezer.pdfIn PDF document text
    • http://preserveproperties.com/userfiles/files/tawufifanomesed.pdfIn PDF document text
    • https://koratspring.com/upload/file/20086285677.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c2ec974a4---67909861061.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/50219eb04476b843f25c67b8ba901c0b/17007500611.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=minecraft+download+free+chrome+osPDF 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_off00015ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17700 10820 bytes
SHA-256: 23a2fa1acc7662bf24868b5278c7594ab11cf1ca34a29a56de1b37e00c4474b6
font_02_sfnt_off00018fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FD5 18124 bytes
SHA-256: b9ee22a8279fb16bfa2775978350de71a92ac6341f381c81644e33d8c2e1ba95

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