Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ccaa64f8a787d8…

MALICIOUS

PDF

82.6 KB Created: 2021-09-02 05:35:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3e3f1bc42f1dee39ad340a776a966b47 SHA-1: 1a86db4df8239f291afc53270bb05c7cfe38951c SHA-256: 45ccaa64f8a787d82bf7a9392000acece58b4d51d073db9afa3d9bf69a6e62f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to lure users to external sites, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 6

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=good+morning+message+to+a+long+distance+relationship PDF link annotation
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/aqv7mr54f8j604hlraqd054f17/19538760319.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/e5ab0f43eca3bf55b73f7c4dfdd81875/9916385576.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/25320734723.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/opf8vbn8sjqe6tso11h0osqfi0/15129711371.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/a5f33965e845de711a331cad6c3875ff/tazudu.pdfIn PDF document text
    • https://ovalpolycoats.com/media/13741917742.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae298b858f7---dapifepibupab.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/26057482269.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803d82114b3---fanefibaguxod.pdfIn PDF document text
    • https://austarpharma.com/upload/files/13764601423.pdfIn PDF document text
    • http://collegedelunion.com/clients/76066/File/ruzizeguji.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798418edf6d---donanirivobajexuxarutik.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/57575650231.pdfIn PDF document text
    • https://clubon.top/uploads/files/74322559587.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/14101945464.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e0e81d44f---91043448060.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/xobudixafujukalur.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/52727993873.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/16424329706.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/edaa20784a5b3953bf0b2436b2b88ff6/79554426649.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/waduguvunagolokikixu.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/xewipawekakar.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/wesutezekizubakofezafava.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d469d419e---24704990094.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e1b29d477---sovolum.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/nilirimijofekaribavelinu.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_off0000dc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC00 17768 bytes
SHA-256: 7e5fb43e5bfc2777b9a7dad1d95e322dc416441a687a7ff9713a9c94b2483bd6
font_01_sfnt_off000109b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B9 11000 bytes
SHA-256: 03f89a207e9802646154c6da87a6f35bb0ead9603e956471a093f611a9ecebf8
font_02_sfnt_off000122e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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