Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee268da111151825…

MALICIOUS

PDF

99.4 KB Created: 2021-07-05 14:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f47af078747de052b2c25037a4579383 SHA-1: b5c8614a5c70bc2ca42445c9f7bc5945a35d621f SHA-256: ee268da111151825e443c534257d94961885b06a67be3902af11aa62ae01c909
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The file's structure and the presence of external links indicate it is likely used as a lure for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 https://philabc.ru/uplcv?utm_term=narrative+style+example PDF link annotation
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/3efhrhtvmll1ebg7m3ibrfe754/99752295044.pdfIn PDF document text
    • http://namngonviet.com/user-/files/64442979875.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/3v5849sgm1n9iae3f7kc641kk6/zaragarixila.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/80531308324.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/begawewiwaloli.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160820d016a55d---81303680301.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///foganapusawel.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/89303569171.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ba27f1eb275---95627268649.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/gozokumonelew.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5e5b04b5e---femotejinadibel.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/8ilt044irdbkb717oq478dvlg4/fibagitudowepugomav.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/0110ce39b2568d6057c56c77ac3096c5/92650355739.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c951bbac327---52180202278.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/e5a679e962981030d44ef0d9cef84717/37525956254.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/4812d250f482b9276b408843c82d5402/21019996495.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160986f3462247---mijiruninusaporijedit.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/79385502944.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/fugimefaxojaziwif.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/42744301929.pdfIn PDF document text
    • http://renknh.com/ckupload/files/3545192865.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/60250697515.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d6d875e7f---76711856907.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fd53860d8---53490840319.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/26391066105.pdfIn PDF document text
    • 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_off00012510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12510 10448 bytes
SHA-256: 9c835bf80f9ded6013a6078192f85af56c5c6cff6d9c4a1e87628690731c8a9a
font_01_sfnt_off00013cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD0 16892 bytes
SHA-256: dc829b9076263f235c645adf2e07b7a60b2c300811c5c15ab8f55d8219fed584
font_02_sfnt_off0001685a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1685A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1