Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06e7167a909ef58…

MALICIOUS

PDF

107.4 KB Created: 2021-06-28 04:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 37a23c40e5098604e503161d9a2e085f SHA-1: e15eac95158294484b373ffed24c890a11e8a452 SHA-256: d06e7167a909ef583b5ffd3715ea362fd17834ef04577cadc17cecfbffb5feb1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many of which point to websites hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to distribute traffic or potentially host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://perfekttorun.pl/pliki/rofukezosov.pdf In PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081c4291ae8c---68370110974.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/99fe86d0414938652f2e7b2d9a1ecc5a/tapuwepovured.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16077242c8edff---94486583989.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29059979593.pdfIn PDF document text
    • https://csn-alliance.com/data/files/21701788579.pdfIn PDF document text
    • http://aweibel.com/Photo/file/dowonenuperi.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/74226d8ea3c5790aecd6c9f1281a2c33/57396574238.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16081164a86613---23103806652.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10ebf36a0e---wiwuxawogupadurun.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/46bba690fbdf8c6601bfb0174e40c5eb/90637216600.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/6d2e56f1c7104f190d881960160848f4/81603412446.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8972e519f4---54347024114.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/84591070158.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812447045a7---82893332531.pdfIn PDF document text
    • https://service-panev.com/userfiles/35760330809.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d81f4e2f0f5---juzisogupan.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ce92c9390---28081352961.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5af3fc00c6---73089380803.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/dkv023672jbre4b4ncb7imlk60/wusamukudogixopetekip.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/bc8d24d055b5e507b5695d36013cf787/rifugodamepeg.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/bujowojesitiwi.pdfIn PDF document text
    • http://thesetnews.com/images/fckeditor/file/mapakamebejedam.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/nuwafudepebitugonasatibot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=what+does+yawning+do+for+youPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A23 20708 bytes
SHA-256: 037fcbc42b13e508d11b11350211fc1374ca980ae3f12d2b0eccc272fa93a6cd
font_01_sfnt_off00016f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F49 10880 bytes
SHA-256: e1a3b267180568914ceae8dbad4ac641cc23b5c90e680efa95c85b6228bfaedd
font_02_sfnt_off0001884b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1884B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1