Malicious PDF — malware analysis report

Static analysis result for SHA-256 a162c36a1d4d3bab…

MALICIOUS

PDF

90.1 KB Created: 2021-07-06 14:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2eebae1ae8949a91438bdb98358c1eef SHA-1: 3a8bc1757171423d21a7db9448dfd8a1f1e41d09 SHA-256: a162c36a1d4d3babc9603b23dbf8d8cc49bf9cfeebee678cf719f596c6e507c5
124 Risk Score

Malware Insights

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

This PDF file was detected by ClamAV as Pdf.Phishing.Trojan. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no further context on its specific lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.2221

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 https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/0b4b6ac16fd1fa06f7cbc4eff43a4ac2/64200896389.pdf In PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/cu50261o19cto1b7m2vv7al362/vipagobixupebenagavunu.pdfIn PDF document text
    • https://irantruck.ir/data/file/63365553116.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/sarogibovuda.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afd829dcb5a---73142589134.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/248d018871e5d002fcbfa2dc924a57fb/xejikanerakiga.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/vogixemasefitekusigop.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/35659533794.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608355e1ee701---limiwedanevojig.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a708ccc8a2d---25523633626.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/d212edcabec6d645d463acf8b1448c5f/resologof.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc0f5526a1---xosufo.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/94581132212.pdfIn PDF document text
    • http://ithaca1961.com/clients/875375/File/82983923202.pdfIn PDF document text
    • http://rld-carbon.ru/file/80954493587.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/94099894076.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/4c3d63b9c7dfa66fc7892ab7c3393d1f/15025164080.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/7h0rikpl5mcu47d6srcqf1hma0/14551773793.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/18292ac427c74a586950b38e06bec3a6/pewoje.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c649c6e4fd9---wadebuduk.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976b4588d0c---dagunepowubegapede.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c129b7f278e---57824166687.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf8edea8d3---rezab.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/37495973122.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609247c5a0386---gonewofamu.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/198619a5bda5b788a41b90e709961d7a.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/punafilemev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=wicca+in+the+kitchen+pdfPDF 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_off000122e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E8 10368 bytes
SHA-256: 535631b1f7f8873b727bb4c93157cd5d8097f418942d4a5ff2e2234cdd4b460c
font_01_sfnt_off00013a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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