Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69840a299a296b3…

MALICIOUS

PDF

80.0 KB Created: 2021-10-21 01:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ceeaa604ed3515f8048cd24a48a0cd50 SHA-1: d1dcd6362fa5eb89712e8de12e944d47693f5050 SHA-256: e69840a299a296b3e2fe9e42c9f0a7870869e61d60abc84226d4e751f27f773d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the structure suggests it may leverage embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7191

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://nedimgame.com/calisma2/files/uploads/kipotokinez.pdf In PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161698fc2dac16---jagarebukimefaguvusi.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/zutekimig.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/47957039220.pdfIn PDF document text
    • http://charivne.info/images/file/beduwewenujaserawetibum.pdfIn PDF document text
    • http://floridare.ru/app/webroot/img/uploads/file/285506_68791472980.pdfIn PDF document text
    • http://newworldss.com/uploads/file/21287298307.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/sasapuvawerize.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/segofozoxetulikot.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/38313284914.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/nuwadidubulawam.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/36821282333.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/47984892275.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/75311070172.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/roxifiti.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/4442845705.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/fusarenagubo.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c0877c84aa---putimid.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/pagiledusurimuxi.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1616df379e95a4---21418631354.pdfIn PDF document text
    • https://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/85661717352.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1615ce3b69293a---97874083379.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/TxADE9PCSUw/uplcv?utm_term=indus+river+valley+characteristicsPDF link annotation
    • 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_off00011945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11945 10576 bytes
SHA-256: d1e2eff5ed1a70c5f73457cb4c167ca64b87bc73540b8c35135c5f449902e7ef

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