Malicious PDF — malware analysis report

Static analysis result for SHA-256 180be6c7cc7d0c53…

MALICIOUS

PDF

108.5 KB Created: 2021-07-16 08:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ab195ce284e12ac71aa98f68f150d2cb SHA-1: 434928e3f83eb06d22145db8a65d11052832fb08 SHA-256: 180be6c7cc7d0c53502f99a44aab7ed7571779dd73c492df7bbb8302bcc9bf90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which are hosted on disposable or compromised domains, indicating a link farm designed to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL analysis point towards a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9666

Heuristics 6

  • 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
  • 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 http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/metanipezuwevosagosipi.pdf In PDF document text
    • http://animalscipublisher.com/files/upfiles/file/21851213327.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/kvheegs41ok1gbteckisi0q307/bekafeliwozepoj.pdfIn PDF document text
    • https://invest.pl/userfiles/file/wepibizinodidadu.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dc3d1423e---xafazaj.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/d79adb3c39286e5892172a73d0caabec/tejuzorena.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/kiwop.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/lusujawafop.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/49770811772.pdfIn PDF document text
    • https://digireg.es/upload/10192750892.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/zoximibiwawetunumojenazin.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/42342948122.pdfIn PDF document text
    • http://rld-carbon.ru/file/58404679484.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee21c28461---xaramosarisowulabob.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/clucq56gcegq9429bkjestqns0/99423731402.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/ccaa31ba18f030304523e44d7d746861/zajisatoduxikofavefuwuxub.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/65265510997.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838d3430515---bijimepozerib.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/gekogaxomoroturomawi.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d4231510a5e---52484016574.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b172348454---71864985967.pdfIn PDF document text
    • http://clubcrudupsonoma.com/clients/1/14/14cf715f5cd05ddba197ceaa5938d7d5/File/dubugevetusadipazuwi.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/9agdrr6b5vb9jvo2kt8ojnu33f/filekuriv.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e37dd875376---82998823316.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/fikabewezaz.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079e239c653c---vamapokasewowurox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=meaning+of+begged+in+englishPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00012728.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12728 27520 bytes
SHA-256: f23ede0034a36487280f94c045d45486edb18c1d72317fe3703f8b22a80213f2
font_00_sfnt_off00010f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15777 19416 bytes
SHA-256: a9c83d26a320baf5eb03435918b519b3451d3744e58e66b9a2beaa535cad267b
font_03_sfnt_off00018a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A7B 10568 bytes
SHA-256: 3e3ff4c63cebfe909fc62cef9811fa09800075c4c48d8412cded36c1a29a22e1