Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e7aee87cc95447…

MALICIOUS

PDF

66.5 KB Created: 2021-09-15 09:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1519637448ab8cc3f8f1bac2b5a62d9a SHA-1: 4be09c8c962b37b237a94c3d78b8d024c8d08af4 SHA-256: 47e7aee87cc95447d7ca3e666644b1d5e7ba7f5d5e206d6337000f2a1c2bc232
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, a common tactic for phishing or malware delivery. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3159

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 66 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://garglob.ru/uplcv?utm_term=worlds+hardest+game+apk PDF link annotation
    • http://www.mostenpo.jp/userfiles/files/21289198940.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/mipoxozejejapedij.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/13511523387.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/62434713472.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/nisarureni.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/xotomeritexixelubusog.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/43728645011.pdfIn PDF document text
    • https://aramlasmerok.hu/uploads/file/zinevesagosapizelekimutu.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/9017204319.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/ligikakelabunidajifanufu.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/80481075558.pdfIn PDF document text
    • http://tnslib.su/userfiles/files/44171405148.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/47316859081.pdfIn PDF document text
    • http://saraya-shop.ru/upload/files/81184083280.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16130811514d73---bulidedosebotidujaj.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/16117075190.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/dg6c0phonk4u8cj2oqdohlo7f4/xejanusefudomesoluluzew.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/losagazupuwi.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/senakusipolapujejawizafut.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/9432186772.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/8314985080.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/90918071846.pdfIn PDF document text
    • https://pomtco.com/technical/files/file/19832534868.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/99223622177.pdfIn PDF document text
    • https://segurodegranizo.ar/noticias/fckeditor/file/8251243271.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/63663126175.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6dfdf1adc---38581317869.pdfIn 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_off0000b2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB13 10728 bytes
SHA-256: 3567b214079ed0910da98849e96bc1e14bf125ec8b67d9fa6d5d2e40e77699f4
font_02_sfnt_off0000e38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38B 13880 bytes
SHA-256: a8db17f29fdc16b986661b7884080e822153bac59915a74ead92bba4bf283633