Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14be7d6133bbf3b…

MALICIOUS

PDF

82.1 KB Created: 2021-06-30 10:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b9e191fc3b4ffa35f4a41cb3c9929a07 SHA-1: 856489c6b97fe5b41e8b043c607bfa0f0b647910 SHA-256: c14be7d6133bbf3bf1997e616efa2dbf6146df42bf928c54b3d66a8dcc0a2919
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a PDF link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://bettynblue.com/upload/fck_img/20210515/file/mojixadomelupevazu.pdf In PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/9f56cb2f0d2a087f19afeab0cdbd2174/zutit.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/37761002125.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071c005667cb---nazofikakukedubu.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bf8f249e9---muxogukezetupamaf.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/53071979595.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ru0s9nebafbojbgkbm0o0htf15/44065363288.pdfIn PDF document text
    • http://beateromer.com/bilder/file/benezawejidezavalinez.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/66644948027.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/mapivuwatupuzagulebuluw.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098334a8cedc---vikinibezimamugusililora.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093d253bf90a---89660881316.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f591828ebea38417789ace2e36e3213e/lefirazesije.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02c880f295---nifaxojadir.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608459651fad4---93773597030.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/luferelibubemiketol.pdfIn PDF document text
    • https://stvorki.ru/files/file/kufakunuwipitodovo.pdfIn PDF document text
    • https://datawire.gr/files/files/ruvunerajixevulemub.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/vokewofawozezipivomor.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/67942590181.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/nurizozabefin.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085be9556175---detufopemupi.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3dbb5a5c4---kovog.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/nbmqgumoieb3r7v530piprdjbt/tifafixite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=if+the+area+of+an+equilateral+triangle+is+16+root+3+cm+square+then+the+perimeter+of+the+triangle+isPDF 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_off0000dd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD25 16200 bytes
SHA-256: 6b891dc8addf30d480b1a4feab8c2be9d04e0ff6aebc2a2d084ffa7b8f46e0d6
font_01_sfnt_off00010727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10727 11516 bytes
SHA-256: 3c2e0d87146439dd5d41719a26bdbf3eae456da5258bf40e3b5fce3c2c79e9cd
font_02_sfnt_off000121fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.