Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eabf341347b2f94…

MALICIOUS

PDF

80.4 KB Created: 2021-08-18 17:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f13340140fd71bd45355679bc82021ea SHA-1: aae1714f52cea7f524d149f1201af806d7b148ed SHA-256: 5eabf341347b2f94e5e7d07d6d70e43bc396bf38eeaa8c1cabca49f2c914bc16
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8943

Heuristics 5

  • 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
  • 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 http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57ac06b66b---9674845680.pdf In PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/70fadd05c3ab0fa3b4e035eddbdb1ed9/33074324334.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608baa7a3a41b---rofotojaj.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a41af76328c---samosenebezagopipupe.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/midomefakijab.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075ca07d80be---49588696525.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c72cde5b912---dorizaxojojal.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c778b28f9d---kinojosodopowavim.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607442dfacc0f---8689562384.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/30108422077.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/66443062138.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/dk1jthisl0otr4m35gap5qkqn7/32098471790.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/dexetonevukesu.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/fazimux.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6adef03f7---37673081898.pdfIn PDF document text
    • http://hotstamping.pl/files/file/fosepe.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/6d39ce443d1f2bd3aa5b1cf10dccc26c/23300249170.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/xunilawuxetelaj.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/12244235525.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cad5c977e6---32829782837.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/gusasikada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=lg+43+inch+4k+android+tv+price+in+bangladeshPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70E 17840 bytes
SHA-256: e3d84ef733b9726a8c4e7425e74322e6527d623b2acbfe64e09f70cb18eab4b4
font_01_sfnt_off0001161d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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