Malicious PDF — malware analysis report

Static analysis result for SHA-256 df740752f4b9cd5c…

MALICIOUS

PDF

50.9 KB Created: 2021-09-10 01:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c1fabb73f51721c71c180f92a4550077 SHA-1: cb6288104571cf983793ab9a4f5eb40e8ddd93a6 SHA-256: df740752f4b9cd5cd338cabf8667a6bb546fe271fccd40440b65fc541a1457c9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The file's structure suggests it's designed to lure users into clicking links that could lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6036

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://coretry.ru/uplcv?utm_term=linux+distro+with+android+support PDF link annotation
    • https://defrokatilai.lt/images/files/43861513805.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/31563694169.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/ximisadotewuru.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/tisurijiriziximapiwebu.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/69730960867.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/xosuxaloxogivoterak.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/rafabugaxajan.pdfIn PDF document text
    • http://xfswchem.com/upload/files/zofegenupepiluralob.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/wirupewezudanenakepa.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/93252621675.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/78433631148.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/006f46c1234cf997c82508a75c44f370/vabijidiwim.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/60075233239.pdfIn PDF document text
    • https://architektor.ru/uploads/file/10202371223.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/c973fc8eff937816605954708c2b979c/87395952976.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/tegunewafajoseg.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351b1b1347a---96995618874.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210901045553.pdfIn PDF document text
    • https://olterus.org/contents/files/87285180723.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/dedeg.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/4sd6qradglall56ju2m3fntkcm/peruxopet.pdfIn PDF document text
    • http://toroisg.com/public/images/files/97827539662.pdfIn PDF document text
    • http://professional-tuner.at/uploaded/file/1676758757.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/duriterem.pdfIn PDF document text

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