Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5d44eae74854bd…

MALICIOUS

PDF

83.4 KB Created: 2021-08-16 18:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 535d2c3c0c7c51c20e152f82409b51a6 SHA-1: eb762cc5a690d0b843bc7e1f8170a3e88b07f73f SHA-256: 2b5d44eae74854bd6d52292fdd1ac064dc674ece59c00b0971f8c04a0d7546cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to lure users to malicious content. The presence of a URL with 'arcgis+10.5+crack+installation+guide' in the query parameters indicates a lure for pirated software, a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vitacanes.com/uploads/files/48084098585.pdf In PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/zevonopakagikeremisi.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/62mlbimutms05kafk5jdi27s0l/gopesosirimapowubomivetu.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/43f65a49f4c3fe1b87a7ef8cb829e7e4/vawubukaxatesekiwalositi.pdfIn PDF document text
    • http://ingfrimale.com/userfiles/files/64011250824.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/78343162910.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609490ac9839e---bizeni.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/pupad.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160928b295dd38---fegotalekegesaz.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/poneludopotib.pdfIn PDF document text
    • https://juegosinflablesarizona.com/files/xexonitif.pdfIn PDF document text
    • http://azizolace.cz/images/file/xapalof.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841bef85fc5---dazosegovelusobu.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/4990365825.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/27755746983.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/c8dff073422565316ab105e81abd079e/wulotagufaboto.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/4459fc5bd13c0804be5173da6b7d48bc/veruxeresozokexuvevi.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f60171f252---funumefegawazumek.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/9358843a3dfc786817e52153be70408c/motigakeb.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/ziganovelusepanexotat.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/dalikuzobidib.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/10163815894.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=arcgis+10.5+crack+installation+guidePDF 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_off0000e335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE335 11092 bytes
SHA-256: 55ff2f3f848e39fe46bbe808f052f12f4339db2c2c8cf730777a1b8b565966b1
font_01_sfnt_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001152a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152A 16304 bytes
SHA-256: b4a7f3ffded77b2dd83e7f014e6f91e72d1c055e81c2471c5c4dc1d0f8973eeb