Malicious PDF — malware analysis report

Static analysis result for SHA-256 384d7e1bcc40dd75…

MALICIOUS

PDF

76.9 KB Created: 2021-08-02 09:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: eb86058abe9dcf3ab267f78192245afb SHA-1: 10823ab18dcaced4d6a4a6f7b9fbf6461fd98841 SHA-256: 384d7e1bcc40dd75b97ae5710aa2ee057aa863e2f3815a4fdbcb076c4a44255b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple domains, some of which are compromised WordPress sites or hosted on disposable domains, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crysiq.ru/uplcv?utm_term=programacion+de+operaciones+definicion PDF link annotation
    • https://asthasupermarket.com/userfiles/file/debosarikikuxoduxubog.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/78939598253.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/380486690.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160affef1911f4---wezoxowojumis.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/luvatuxapugozomubirijeme.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/96760705803.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61745134424.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/28959938425.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072d5774d22c---3964522435.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/33498597929.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/gobowopesokabas.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/c7f770083b820a286834b8f9c2662bc0/41002226165.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f3de7b051---jatiloginomek.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074a4687812c---59792936554.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/1f713725c9a199de39e95d8c4687b089/vapiranosemefij.pdfIn PDF document text
    • https://successalpha.team/upload/files/12175616112.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db5d2bbed63---xejamepozesinavi.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/jazelenudadopej.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/kovazevo.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/bupunetanamilov.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_off0000c912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC912 10820 bytes
SHA-256: 0fa683000d47ce91dd76cc5baa5cfe0d2be6563545913c66cfca6b810a278855
font_01_sfnt_off0000e1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C3 17292 bytes
SHA-256: 9e4948dfaaddc46c6098943a1cd4352cebf833cdc039a1783bec3734e22921c4
font_02_sfnt_off00010cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1