Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14bf3c11fe066d7…

MALICIOUS

PDF

108.8 KB Created: 2021-08-10 01:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e089b26266e059fbafa4fae1a613b775 SHA-1: 1d4e8dbfdddfec45cb5d399e0066066f26e95348 SHA-256: e14bf3c11fe066d708a0cbc5ba3682ab7321c8ea78cc07f5019d45f2972e9907
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

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
  • 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 https://synerhu.ru/uplcv?utm_term=liberty+equality+power+7th+edition+chapter+outlines PDF link annotation
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fa1b68ed8---19243487140.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/iho5grfs3ettibkttgtbk5ps0l/76014064685.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/mulukupexarusuvetufodeve.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/c5e6784b87aa1cab3f1227e321ae50f8/tazemuro.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3f629ebe7---82326873175.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/e7933028362ec1c41befb9f6b6993053/46366912863.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/rabolimovukazerisugema.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/gilezok.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f3801cdef---vaxax.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9f031cd9c---mimazojeki.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/1830061068.pdfIn PDF document text
    • https://desense.eu/uploads/wysiwyg/files/15884887854.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/vomojozimomori.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d83c6fd8d---vetuvin.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/4rnm9b4v8721dvf8eh2nmgss11/1441456479.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb0cf78ba2---ziguba.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/807c4c3a5f94752cd6eb5329093d705a/79293062028.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072001ee33cc---bezorubetogevobudaf.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/devupugejejipasexevuvuz.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/lfcq7k5phcbntmak5gfpg8atm4/gezozunal.pdfIn PDF document text
    • http://liberty67.com/clients/41815/File/wexapalilo.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/79893327723.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85b1a79621---41380588515.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b494749a30d---sasezizare.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-4-30/20210430042056742764.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084360db5228---64824713799.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725dac83b7b---ruvugisozusiwog.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/49693693781.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_off000141a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A6 11204 bytes
SHA-256: bcee6ca30488bbab45d5964140763c44bed3057b360712774c44dd4275130fdd
font_01_sfnt_off00015b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17395 18812 bytes
SHA-256: 8d08fd13582f432a56fe54864edb4e6de71b5913323a1324113f0b8a8423263a

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