Malicious PDF — malware analysis report

Static analysis result for SHA-256 af64c5de48651dc7…

MALICIOUS

PDF

77.5 KB Created: 2021-07-24 03:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a239c2997c093fa377a196b58a00e6fd SHA-1: af65b8d46bb5e9cacc69df7807f581f35f1446f4 SHA-256: af64c5de48651dc73742ef43162e608f6f9eb5b08a0461d66c8ff13950fc968c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a likely spearphishing attachment used to lure victims to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5190

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 http://santamariamikado.com/uploads/files/62483814373.pdf In PDF document text
    • http://ahchala.com/img/file/bisaxufefatoja.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/01337727d38c79ddfcb33e235094dccf/kajefamigubuzexigazafosid.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c585be4f6c---zijivebixijenezizebavinil.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c20dc04dd39---gubusatilesulumarovebis.pdfIn PDF document text
    • https://senhewood.com/d/files/76912078956.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943f4047206---94345891986.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/82854487413.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/kdnon3igpm6ne7q7sagl1h5nh3/7261597647.pdfIn PDF document text
    • http://doyen.cc/images/upload/File/lerabuz.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/32222537086.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/b594949962845e28da62922fb535d9d5/bagoretawusefigesase.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0a9273639---71809187423.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/2gbhan487ad39j8l65rbtlrqfj/15613848831.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160af62a0203f8---vapipelemenupe.pdfIn PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/96315440087.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d69aceade12---rumuzu.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3d2c09771fe5def162301c2673bc92ea/zenajefininoperaf.pdfIn PDF document text
    • https://penal-garazh.ru/files/9771337022.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/fotanuvurakarafe.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/1da00b07894845a20364a1f0142f1c15/jimidaxozo.pdfIn PDF document text
    • http://casaalu.com/luutru/files/72063461991.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=multa+por+nao+usar+mascara+goianiaPDF 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_off0000ed7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7F 19240 bytes
SHA-256: 65fd9e04c663293fb345f41c255d05201709c9ec7c58f7d97c9ddd1df84ca055
font_01_sfnt_off00011d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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