Malicious PDF — malware analysis report

Static analysis result for SHA-256 145cce51d73e9f96…

MALICIOUS

PDF

69.3 KB Created: 2021-08-07 21:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 0bf02045143e57e039e68681fb836d70 SHA-1: 0e244bf44dca76f2d1fbefffe0f1bb33e110e8be SHA-256: 145cce51d73e9f964825b2c61df8332e903f827cac46cdb261c554ab04099862
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to numerous compromised CMS upload locations and disposable hosting, suggesting it's designed to distribute further malicious content or phish users. The presence of embedded URLs and the nature of the heuristics strongly suggest it's part of a phishing campaign or malware distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

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 https://allytemp.ru/uplcv?utm_term=will+and+going+to+future+exercises PDF link annotation
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/21bf47b86cd514e4dd6657f3ae706e9c/xitemijuwijozuvosozoniv.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/37935413149.pdfIn PDF document text
    • https://vyaspublicschool.com/ckfinder/userfiles/files/sawizeg.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/0gtm18p45f7fo276hll1a1itu9/29070279494.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16071c933ce724---18354490578.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/jusavoruwevajawuki.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f0ba0e01e---basenudunekud.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/63726321810.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/73242624564.pdfIn PDF document text
    • https://bamor.org/userfiles/file/forifonozorin.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f391312b7---41899523775.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d0cdc41ceb8---febozi.pdfIn PDF document text
    • http://totoumi.jp/upload/file/xaxovodopividizazesiripu.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/gojim.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/2f44f3172cdfca0130a97a716691da63/53114335061.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5855bc8c7---58653653942.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/deletumu.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/63060531637.pdfIn PDF document text
    • http://sportgalaktik.sk/userfiles/file/21985710998.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/5cio6o5rams5eqjhs49c1rotnh/29957238145.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1610e8e1d9b3b3---sozibikudapo.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/wipowufarajixasonisim.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/jalosudi.pdfIn PDF document text

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