Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7194fd9e32e4c8…

MALICIOUS

PDF

86.7 KB Created: 2021-07-30 22:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 22651549eb1b2926a7f530e08aa5eec6 SHA-1: 92244e47f7f56eb721729f1b61c5d664ff8e6da5 SHA-256: 2e7194fd9e32e4c86220ebdf8389fc93018a8aba5e549d46111c910824564b23
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous external URLs, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://nomylo.ru/uplcv?utm_term=homeless+bird+chapter+4+summary PDF link annotation
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/nopesowibesuwo.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/5739305601.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f85d6c8833---28086660372.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/vsu0pui6tee4i90mhvibd93v0u/tovarufipojuxolifajogez.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160751382d5fdb---97697161342.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/07b18ab212267f21e0e3af8ee9a26aed/82134368492.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/49261462465.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/c0b5416d9d8d15d8d1201e4ccbc25573/tuporixidijibi.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/8323721539.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/levevewapesafadulajobasim.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/92173218880.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a749ade00e9---totofekeg.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/61220525215.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/71cc3a97a74c7ab1b120426891247c9c/pupulemarovagotepe.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/nakakat.pdfIn PDF document text
    • https://angkagenap.com/contents//files/wiveb.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/borewe.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/fee54cd4b33dec4d3114e8f7d3b525ba/10013728983.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/10717654529.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/96594063923.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/65028062821.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/14969762382.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccbbdde65a---pivemin.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/wazipe.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/7149d3a9c841525e426b879a469d8928/pewila.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_off0000ed7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001058c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058C 16760 bytes
SHA-256: b116e7290b13b1f32a26a70dce30ad02cc83e6989abfcad21d46a1794d11f510
font_02_sfnt_off000130f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F3 11100 bytes
SHA-256: de32efd6f6a6d7493100ab8c3cb995757e7159a57908a333e0161b6d0f8f65b8

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