Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a12e96834f784f…

MALICIOUS

PDF

63.7 KB Created: 2021-07-20 05:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eaf5c20d2f4487342210bc588d6f6ea7 SHA-1: 2128f18d00bd04f959ade34024f9735a843b0826 SHA-256: 26a12e96834f784f0051c63ed253bfeb91618a5891c90568decfd68fa11a5887
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting it's used to distribute further malicious content or phish users. The embedded URLs, while numerous, are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9212

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://eotp.info/sites/default/files/fck/file/tavogunolusipew.pdf In PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/vj6h9bgo4o2bv46bsvc65jd6kh/dibugunifivumusa.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b8b8b8186---jojovefosiruximanamemuwu.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/eda0da9cc80ebdf97886927cb39f2625/jetufexavakulisa.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/nifinixivazinegikavupu.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed0000e091---zewutalovijefosamalilu.pdfIn PDF document text
    • http://reunionclass.com/clients/7469/File/setajobupokimesusub.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a37d27015---narusupabizufoxe.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/94c40dc302b5528a5e827056490803a1/857327332.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/dozapunof.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/2cngn6spephkem3kvsj3vhb7gj/69931605383.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97b71c1f4a---32628110637.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/72724225715.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/b1b79fff538236f7288bd1a97ac98ca9/kedisopisuzibeduminubuj.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6d1a3e448---gamupizo.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/5479325675.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/194ad7bbf8935620cd7f1b01ed243a4e/xubumivuwezapole.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/zafipurukob.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d28477e4ef2---32778889103.pdfIn PDF document text
    • http://guilfordvikingsclassof81.com/clients/4/47/479b0a304b4cdce99dfe3eda73a59016/File/12062102587.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/29962885300.pdfIn PDF document text
    • http://praguetransfer.com/files/file/sejikutifogug.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/meponufofujogebovovudezi.pdfIn PDF document text
    • https://parc-hotel.info/file/32595330095.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=15+mm+in+inchesPDF 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_off0000e846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE846 10056 bytes
SHA-256: e7c2ad5fdd93437e7d7df7bafd35f0337ad9ae08d6fb3f25e30885188c469fe0