Malicious PDF — malware analysis report

Static analysis result for SHA-256 42481e0fdfd6173b…

MALICIOUS

PDF

62.5 KB Created: 2021-09-05 03:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4f9da9eba9f3ecf53f618a0b157030a8 SHA-1: 70ea33726c98f7c4ecf62b72412b501571242726 SHA-256: 42481e0fdfd6173b5fe944ee59b776e91feb95dc32a092fbd2ccabdaa8fcf110
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous links to external resources, many of which point to compromised websites or IP addresses hosting other PDF files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick users into downloading further malware. The presence of multiple compromised CMS upload links and disposable hosting suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8923

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://mldom.xyz/web/img/podborky/files/zitipivuteruvinilewaw.pdf In PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/0bfc763796fffd50b5c08a588d5fbaf0/34718313654.pdfIn PDF document text
    • http://vejwun.cz/images/nuzukipewolizakuzumofe.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/20400944024.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/lodipodagez.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ncn03acg5u4rjc210sl208ila2/86958476247.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/0533820301.pdfIn PDF document text
    • http://bckbytow.naszbip.pl/img/upload/files/88153577012.pdfIn PDF document text
    • http://krupongs.com//images/file/1039554649.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/77452451404.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609822b204329---72681248552.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5ba8be343---sidugugedemubiratir.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/gotegoxegupafowidab.pdfIn PDF document text
    • http://soc-in.com/data/media/files/41972650731.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/131bcf3a4dba654cbd28fda45083bf75/makesore.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/9d879b8ae557f23153041fd19bb04e4b/folomudamekopunapopelafi.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b382334fb47---kesago.pdfIn PDF document text
    • http://artospace.com/pics/file/19334868544.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160888ae07bba4---popitinuxix.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/wujogen.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/danitozemexe.pdfPDF link annotation
    • http://jcon-aps.dk/userfiles/file/fozeguremujavobusib.pdfIn PDF document text
    • http://dejede.com/userfiles/file/fetuwanomasejaf.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/cn84c4bsv1r77c91lpjrg42dc8/1659274377.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/filojem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=view+tab+in+ms+word+2007+pdfPDF link annotation

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