Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e3d2d75b50935a…

MALICIOUS

PDF

83.1 KB Created: 2021-07-04 09:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c5469986f1bd87e5314b9bbb7143d1f4 SHA-1: 3ca51d615d66c58b4483218f408a801305f89a0a SHA-256: d4e3d2d75b50935a1e59c30b0def2bb0f1eb04094086f98f0e3f427218d588c3
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to external sites. Several of these URLs are hosted on compromised WordPress upload directories or appear to be on disposable domains, increasing the likelihood of malicious intent such as phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3632

Heuristics 5

  • 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
  • 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://williamshudson.org/clients/3/35/35bf74ce48b5c120232fd40fb4fe3e45/File/5209854242.pdf In PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/7ea3549511b34cf1c33af9ec84452f6f/4782864037.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/fovosatepomigapikem.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/35885970464.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/manesikojidijuwofek.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/d3daa7e0252d2cbc2f53d9424c137aa1/dawawutepe.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bd25324e694---dodilelividilutor.pdfIn PDF document text
    • https://rosycaffe.com/file/pipasivi.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/070f75b68d731d2350b9c462a3cc231b/dilugaketopov.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/c3b25a36bbb637fce9abcbf3b4f32365/44327389973.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/53t9igu0k7jqo0r74hc9206dec/sujifemot.pdfIn PDF document text
    • https://noddy.nu/images/file/xesot.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/filawelome.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/47873696485.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/gidumegazolejorosisavi.pdfIn PDF document text
    • https://t2sc.me/userfiles/11411739884.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/e4dc8acfb9dec3443d229ae193fdec58/26399191719.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be5ddeb4148---1595816953.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/26958064635.pdfIn PDF document text
    • https://fishboat.hr/files/lonozuj.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/305e33142bf84ebbc6fe6b3c291de746/tifinufodu.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160996c1626810---36739252898.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/pogumafovagapogimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=should+i+eat+an+apple+before+bedPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11628 10740 bytes
SHA-256: ead4683e3ac49c96017885d5b664662f00e5370b95102a3ac55ccfb66ebb5004