Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f730a1f82d1f8de…

MALICIOUS

PDF

48.1 KB Created: 2021-09-13 16:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8e0b0158afb37f7497409c72fafecef3 SHA-1: fb88c1ab16f688a8d59d8d7a4d06ec00573a7f67 SHA-256: 4f730a1f82d1f8de719b1182369aa583469cefb2a0241a3590b1841c5e38bd0a
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution attempt. It functions as a link farm, containing numerous URLs that point to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The primary goal appears to be directing users to download potentially harmful files disguised as legitimate software or game modifications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6237

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://hitecds.com/userfiles/file/fuvuwisifurumirofazudoli.pdf In PDF document text
    • http://ropesadventure.com/d/files/39036134989.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/60810712954.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/52839867880.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613c01713db43---42985162671.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613394e4449ef---57362198718.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd43872022---69166034830.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/pagusemobuzemosazabumu.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/suxaxemedivogafewerebul.pdfIn PDF document text
    • http://stromzeleny.cz/file/55946741265.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/11071858261314bf854613.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/c38371e46484baf25466b5ccfd0521eb/4439166107.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/sidovikawevinisabewenew.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1631487201.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/17799407550.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///18376940624.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/19944389830.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/52348026122.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed027ed2fd---jufuriwusumibiv.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/2c12c907838e539e1d41b0f50f0eadf1/polomiluxajaxazaxekesutug.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/sizuk.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/43236986683.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/95540069147.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/kabodapelebaweluzajo.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/35567770642.pdfIn PDF document text
    • https://timminsrenovations.ca/file/a4qZAElD7Hcpj7RL.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=candy+crush+saga+mod+apk+unlocked+versionPDF link annotation

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