Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf56c7eb19d0806…

MALICIOUS

PDF

58.1 KB Created: 2021-10-05 06:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: bd2636bb9d11a40834e4b28e26005f6a SHA-1: 96bec80b480e8ed48b219cf5b3959dd32b2f7fc0 SHA-256: bcf56c7eb19d0806cc1c8b812b28a411cd81dc6d7e935d428013102486d61d29
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users to malicious sites. The numerous external URIs, many hosted on compromised CMS uploads, suggest a link farm designed to obscure the ultimate destination, likely a phishing or malware distribution site. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4354

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=construction+company+profile+sample+word+format PDF link annotation
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/a08382fce9cbd2536630fb6524ec4fab/gilelatizowejubanum.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/waderowowonij.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/41665317363.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/budolatumufadupevol.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/gobimujugagowubamokuva.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-9-1/20210901062149930886.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e83bd816e---96260690179.pdfIn PDF document text
    • http://rimini-portal.de/bilderarchiv/file/39103480212.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/nuwududitonutirewob.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16148daaf749e1---70483007440.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/nonepapuvupewiku.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/fetifedegudifelil.pdfIn PDF document text
    • https://tckontrola.hr/files/59866735149.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a6c7402f3---43909208405.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/pujadokixewipamuluxesemaz.pdfIn PDF document text
    • http://tecmifor.cl/userfiles/file/bamolofedegidopiwolawes.pdfIn PDF document text
    • https://tivicom.vn/upload/files/92940004841.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/44079865681.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/kiruvapof.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/77248620207.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/65263935151.pdfIn PDF document text
    • https://reclamesticker.nl/images/uploads/file/In PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/86596883107.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/46007416032.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16148360bdd805---denojewusakerogujepakib.pdfIn PDF document text
    • https://sayurmateng.com/contents/files/5124329260.pdfIn PDF document text
    • https://filetorme.com/upload/files/35240445050.pdfIn PDF document text
    • https://adrfarysz.pl/userfiles/file/suxiwupomunoridosaf.pdfIn PDF document text

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