Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1bcc759ad50e8a…

MALICIOUS

PDF

98.3 KB Created: 2021-09-15 09:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b4632d60e075c7d1d5d9012d19081a74 SHA-1: e9c90d86823260bbe7e0ae98d8d1e1aa0709d6ac SHA-256: ce1bcc759ad50e8a259ac71f9ea27327aa016e8d126fc4e73458a4abb41a35cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or are hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6135

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/uplcv?utm_term=the+culture+code+daniel+coyle+pdf+free+download PDF link annotation
    • https://masihpt1.com/contents/files/malikisokani.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/95092383734.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/kepukajodisagevepexakobaz.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161415134b0ae7---borarokawugolaseti.pdfIn PDF document text
    • http://europavloeren.nl/siteimages/file/pumomaduvagaj.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/25605194939.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/57081741320.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/928699632.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/fibubomixusujume.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/79159496929.pdfIn PDF document text
    • http://lawngo.net/fckfiles/nojanizemuxarevusege.pdfIn PDF document text
    • https://dukupahit.com/contents/files/82795209969.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/40336017610.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/jazetowafolotibozarixi.pdfIn PDF document text
    • http://christopherdallo.com/file/nowikawu.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/92469310182.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/46905807320.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/70083180519.pdfIn PDF document text
    • http://dinhviht.com/images/newtech/files/zokozim.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/60174650683.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/dojezezapatodorojot.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///mikazapake.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef8604eed5---37007093710.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613972291bc66---fuluz.pdfIn PDF document text
    • http://khojedu.net/userfiles/file/vuzizivefepawabud.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001483c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1483C 10812 bytes
SHA-256: 95753341665fe562cedb3655ccd5662e556d4d15a713528ccfe9ffda0c87276a

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