Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c47ddccc522a95f…

MALICIOUS

PDF

100.2 KB Created: 2021-07-13 23:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: df550816578f88b8466f04e553a15ca5 SHA-1: 5d4a1959e84cd0b7641668a5b3b51e774c097d6e SHA-256: 0c47ddccc522a95feac15ae14f0269dbc144032ab17131c213103b83220c8423
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, as indicated by the 'SE_CLIPBOARD_COMMAND_LURE' heuristic. The document instructs the user to copy and paste content into a command-line context, a common technique to bypass security controls and execute malicious commands. The presence of numerous links to compromised CMS uploads and disposable hosting further supports a malicious intent, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://bearcatbb.com/CKEdit/upload/files/84144232948.pdf In PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/2ac81e982e8306f38afa48abe5e87c7f/25236472126.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16079bab6e7107---80261090163.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/17488256154.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/59262321487.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/worafesanekokalewu.pdfIn PDF document text
    • https://bojovicsirogojno.com//files/34832769253.pdfIn PDF document text
    • https://petek.biz/resimler/files/99471907616.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/nedorazulesefetu.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/kvf8u1o29fdl3lvh14a18c0gf5/gonurowopafopuboluwokosug.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/404f55baccd951387bd4586a9edaa516/wiripupan.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/dtm26ct0t8f3uqtev4n3j4v300/11556987826.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/b576badb1904e69453b80add3ed332de/79347272871.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a78f9c7bad2---57960800714.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608702596af7a---77693628666.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/56857685932.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979d97ed74e---xaguvaxokinikinazajobitu.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8ef5ad99d---diwasolagomebesavu.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/af963786e112321adba94c78a376df9f/43437447070.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607da60fd85b6---85550265097.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/dexelusorakiranaju.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3dadbcd896---95172401360.pdfIn PDF document text
    • http://learningkey.org/userfiles/kijowabefibativa.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/76942924416.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=khalifa+center+for+genetic+engineering+and+biotechnologyPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/65a0aba1b1ca74265850a01abe298cb2/23206990455.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_off00012050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12050 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13867 10832 bytes
SHA-256: 42c267ab7e47deb868e4978a718ff1adf0b1654be3a0a8bba3188df6a827b5dd
font_02_sfnt_off00015118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15118 19036 bytes
SHA-256: 869e6be084aff6bb4b07ac06581acb969a916237a9a64dcf32ccfe2ca7816b80

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