Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d414fcdb006d7a5…

MALICIOUS

PDF

91.6 KB Created: 2021-07-05 10:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4a96716528630131e94a594a1a86314 SHA-1: 70a66744622c7fe5bd9ba99a9be025c58e663fe1 SHA-256: 0d414fcdb006d7a556b388b78bc0e3d1cb4a482c92976ea160384dcd837ca6a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://beergolfers.com./blog/images/file/nokikaviwadewudirow.pdf
    • http://axiomestates.com/userfiles/file/44352017411.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/s68b4pd5m6c380g1iih95pdsk0/difaxudibonifefum.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa26fecf66e---vuzan.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/194bdf84e3321267135633db2de7d50d/lazuro.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b94ce5744f2---sujazo.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160812571c4b99---badaluzobujafugezi.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb3163bc84---gixazozuwajiwe.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078753ecbebc---62510516610.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16086925cdb75a---91617704174.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/7sbgaoqn6jv5bpq6rfpll3rthv/mapodewiwigamuxoxufeso.pdf
    • http://sllight.ru/design/img/upload/file/vopepuz.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/6oku5a1atngv1qdnhq565t0q8j/80884898272.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c551d8e8d---dituxamiruxip.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/6834a1a1525f2f4a46c4aaf573894126/37643524152.pdf
    • https://oceanflowerhotel.com/uploads/image/files/47725631869.pdf
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/44726521268.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/sm5i6el5psre8e22hgjjmoiqd6/lonisusaratijiv.pdf
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/89339176913.pdf
    • http://auchli-appenzeller.ch/userfiles/files/zunabix.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5493f6e1d6---69126983435.pdf
    • http://ansonseatery.com/uploads/files/tovijenuzekij.pdf
    • http://fitviewer.biz/files/file/rojenobuzomimi.pdf
    • http://davidhammerstein.org/userfiles/file/varujok.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=name+the+index+of+bombay+stock+exchange
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd7a.bin
8d4ecc0320b6c7ac18ba4ca55db15efbdbe80700bafd572209ad3054df610ccc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 11204 bytes
font_01_sfnt_off00011762.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11762 16792 bytes
font_02_sfnt_off00012f74.bin
177906c01ca998d5e5cdf53d7894ede1f0dc2c0f179a22c62b0d0132f0de6e90
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F74 17976 bytes