Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd445bc64c683d65…

MALICIOUS

PDF

67.9 KB Created: 2021-09-05 20:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 52e52949fa44a035d8719daa861c1c3e SHA-1: e5c81b3b14b530065cc451fffea9f708502d785f SHA-256: fd445bc64c683d6553209449513305e018349fdcee960cbaffc8c0de7d855755
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised WordPress installations. The presence of these links suggests an attempt to lure users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5262

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://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd1650673a---bejafesipudevamizomazuf.pdf In PDF document text
    • http://babywagen24.de/userfiles/file/76558921030.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/47103039168.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/731080aa212f2e17faa2813b35a6cee8/daxafid.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/lofeluludo.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/1jmt33ks4uovrqb9jgvpve4obi/kuvopatomiligupade.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/059106eff65be2473bb9b6a5876e3ffe/26326267768.pdfIn PDF document text
    • http://beiks.info/public/file/8940426376.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/8146828929.pdfIn PDF document text
    • http://skincarebylaura.com/clients/862251/File/57310461132.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/xufanibi.pdfIn PDF document text
    • http://cichanski.com/Upload/file/muzobadisovuwumurubupu.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/xofilaw.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/menadufadupetujolekupopuj.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b252ee25967---fopenizeko.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/toxojamoxogatefuluxopupe.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/9d02fdece12d0126fd4a5d60e6e1707c/32323493938.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/ac8b6014c33c37f326e79ec42c355b9a/gaxunufin.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/dc4951a041ed39ff9583408b83ecd688/lixisinojijakagodivogani.pdfIn PDF document text
    • https://alutat.com/data/file/89830554963.pdfIn PDF document text
    • https://healthcareadvisorsgroup.com/wp-content/plugins/super-forms/uploads/php/files/n8fcdgvhk1udoe57vd6hqse8h0/3290835652.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2ad78a152cbeae58b2d5e45001d3332c/zujiz.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/lavokezisotasimegena.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607314d857bda---23552298697.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/5359a986a4928e26b7ce80f3c6af3f87/folataponako.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/57902853635.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=istick+pico+manuale+italiano+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1