Malicious PDF — malware analysis report

Static analysis result for SHA-256 d993d86014785a12…

MALICIOUS

PDF

106.8 KB Created: 2021-08-06 05:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4d53969329fcd95adbd1ae2bdbb88b00 SHA-1: 2c1324cb4c5364a1ee78170982907e4b1777f6ec SHA-256: d993d86014785a12bb433ae8b7f5a790d0f8fe96d6cf49f6f975549558da5893
124 Risk Score

Malware Insights

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

The file is identified as a PDF containing a link farm, with multiple URLs pointing to PDFs hosted on compromised CMS uploads. The ClamAV detection 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution intent. The presence of numerous links on disposable or compromised hosting reinforces the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier clean score 0.1438

Heuristics 5

  • 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
  • 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://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/a4242d264aeae45df0594bd916936356/27948872519.pdf In PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/570679c7b38586f9da9316d8fe562483/78276342569.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607922d99edbf---94619302969.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/kadebajozavenikomigekalep.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/14a35994fb1623d4737a5c63c8bae4eb/patuvow.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/varuzezojofupijisolinum.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/60642508043.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/gufipabubodewoxenujunan.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/pupojavinapudifulas.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c583952f607---tadanuzavabesepaniganegik.pdfIn PDF document text
    • http://toyotarentcar.net/FileData/ckfinder/files/20210620_90C187B073D7663F.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/48a6203487736303436bbce3ab5938a2/36082769904.pdfIn PDF document text
    • https://avvocatoboretti.it/file/fafiwowekavesujob.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/96s7t3gmumi2pij3dflfmc6jb6/bifaj.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/95460054037.pdfIn PDF document text
    • https://bhalakusari.com/uploaded/ckeditors/files/57228365335.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/juwetaninigodulosixax.pdfIn PDF document text
    • https://lecachet.fr/docs/files/97550864465.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a921701e77a---85596324061.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/gajizeginum.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/64879243799.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/2991537154.pdfIn PDF document text
    • https://unaizahic.com/Files/files/69058228514.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b77ec08bebb---nupekemitu.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/nubawowigojeboworezet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=pokemon+go+gps+joystick+android+2019PDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/86263203344.pdfIn PDF document text
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/lixutopu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83F 11608 bytes
SHA-256: 1954ed779dda52fc364415e3044967939789d9717f0432c300a29404ffd47ce4
font_01_sfnt_off000113c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C3 16344 bytes
SHA-256: 756b691c13b983eafa03e47aa9f0b6ad58d5b72d5a208688d70894321573a878
font_02_sfnt_off000129ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EA 18932 bytes
SHA-256: d4b4849a8f9bb80cce348e19be6ef8e2debd406692de919c5dfae9a31a6217b6
font_03_sfnt_off00015a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1