Malicious PDF — malware analysis report

Static analysis result for SHA-256 be70ea76fa252004…

MALICIOUS

PDF

71.7 KB Created: 2021-09-11 21:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 615f49888b05a89008cb897b81fcd441 SHA-1: f9c76c01d05e69a64e2bf50ba5a1fe703753a9a9 SHA-256: be70ea76fa25200447c05a23e94702084b63b2df4ca7846b4101869d5b70c404
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users. The presence of multiple links pointing to potentially compromised WordPress upload directories and disposable hosting further suggests a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4270

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 http://civicwomen.com/ckfiles/files/19063175551.pdf In PDF document text
    • http://songhakbbq.com/uploads/files/36762958883.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/jezelupedaziviro.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/tusezuketefijuduniti.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/koziv.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/tolopaxexoli.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-8/20210908124501921286.pdfIn PDF document text
    • https://datxeninhbinh.com/data/dulieu/files/zelipapalaw.pdfIn PDF document text
    • http://scantech3d.com/files/72708923663.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/59858301701.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd03e17ed6---55624351140.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/ae2a59610af79a18f733b006dbd5abcf/18724379148.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/40828987298.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/92290796523.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/96541053863.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/mivedasekezud.pdfIn PDF document text
    • http://dija.lv/public/userfiles/file/rixipunajaxa.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16139bbe7bc5de---68855897523.pdfIn PDF document text
    • http://happyorderfood.com/uploads/files/gigekapiwilibapokekiposo.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/jikikutud.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/xirositelawebigaxewob.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109030407474213.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/iqvp8101h7jq3ij7jebpdo1inv/99491770685.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/refolif.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/84347186850.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+turn+video+to+mp3PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B3 10592 bytes
SHA-256: f47ad02687bed5c745e289a379c26b0dfaa60473ab96269144918b6ee7e8132c
font_01_sfnt_off0000fce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1