Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0bd230914f2cad8…

MALICIOUS

PDF

80.1 KB Created: 2021-09-05 17:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 43cb671b4f8cd89b493a8586dbbd5fbd SHA-1: 95dc4a2c14d6f6bde96dd4c5064bb56a6754315c SHA-256: a0bd230914f2cad8b97df84c896e37ca6866fb6e970e9121d2f44d7f17a82b96
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised WordPress installations or disposable domains, 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 distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://drsaman.com/files/68270289539.pdf In PDF document text
    • http://solmoda.it/userfiles/files/pugodunerapi.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b66e36a22---lulevikapefonojimolegok.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe7e23d6e26---tevavavegemebewusekut.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/10229900694.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1606d087dca69e---10533845294.pdfIn PDF document text
    • http://caryhigh1987.com/clients/41333/File/bofixov.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/91365573527.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/wuxopevumizewizamuguvasa.pdfIn PDF document text
    • http://xpressup.com/userfiles/file/84999461569.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/m0tg6fe64ls6jil94bmo0vn9e7/sewukizasogigetefo.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/91436654002.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/f57rnbmta9et5gt00of42qrmg7/miranoboluwumogeje.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d28d23a730c---22647485819.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/38748310d60a6d17d90c8968bee7fa05/pojexifiwoxo.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/sujedujefekidewamo.pdfIn PDF document text
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/9220760352.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/1ce6vg4pbci8f58r776hst34b2/15475681178.pdfIn PDF document text
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/wodolewuselemowatufewe.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/suvavoforobaw.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/pmmvqldpjup1pmv9kdir904sq6/surusosujavunijita.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/64144539490.pdfIn PDF document text
    • http://shiksha24.com/userfiles/files/25125387728.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/pabojuboxi.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/lanar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=jenis+penelitian+eksplanatif+pdfPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/31701088748.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_off0000d739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD739 10356 bytes
SHA-256: 3f66da3f6e2861a9f1279cbd2216ca90c2387c7dc300c3d820cd9a3718dbc064
font_01_sfnt_off0000eebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 16796 bytes
SHA-256: af0e0547a9b35c7ba48f4b0ba7461a1788d77b887b9f3c2c41c29a2f867ab77f

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