Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed68e67b8ee09fb…

MALICIOUS

PDF

90.2 KB Created: 2021-06-29 02:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e2a25fe2c0c423df9438706622db5489 SHA-1: e3f450cbf8d5fc972a8d580a391062075536b892 SHA-256: 3ed68e67b8ee09fbfb764192cb96ad9fee9a95c6860accf94d8e0c47a713bbee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage, likely intended to lure users to malicious content. The presence of multiple unknown URLs further supports a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160723085466e3---17165124947.pdf In PDF document text
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/tibusukoxemafe.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/s9kipftkdi3qetigep51phuieg/63306864806.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/rumevipira.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/52144012730.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/76320106744.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/06cb424318b4deaccb1c1af9509613d4/nopazujalerebusawadiruvur.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16081f20338990---dipupofekapesezesekivu.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/firuseworotepojimu.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/1a435685e11bc2607c1b300ab747044c/29287561698.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/0afd4efef6ebe6181b0d6bc5b4671a4f/faviwaganowok.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac090487a80---80148950385.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/abok21mhafejoe16jfepp6s96a/99255002800.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/5f873a954874dffc81047bc6f7a47e28/21789359514.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/a9d69f5f869fc543efdc13f1e1a39100/84717905620.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/xiwazupegakosowobawito.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee908c9c81---12822475961.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/18916655756.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/gebowekapijab.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/kavasamupataravofapavupap.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/110a49b391a6b5c4aa22ae2582873c17/lamofevima.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c37c07c866---kewagizamegujosupeloze.pdfIn PDF document text
    • http://thamdinhgiadaiquang.com/img/files/vutedegefakajidam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=awd+and+4wdPDF 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_off0000fc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC54 18868 bytes
SHA-256: 925c06f43b87f41f1d57e40c5c8e10427a57868728dab33e4100719729bca856
font_01_sfnt_off00012d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14586 9632 bytes
SHA-256: 1beab0ab59811fab0f530a7655c796670c58427b246018451ae06f41f83a552b

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