Malicious PDF — malware analysis report

Static analysis result for SHA-256 68af45cfbf1694f4…

MALICIOUS

PDF

544.4 KB Created: 2021-09-06 11:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0c1d0e7125d451dfbe34b94868eefe1a SHA-1: 1738e21fd08217f9c8b368575278acb7aefd3f7f SHA-256: 68af45cfbf1694f4facd09deefb9a1b47985fcf9f847d56731a07944466e362d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains multiple links pointing to compromised CMS upload storage, likely intended to trick users into downloading further malicious content. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics suggest a phishing lure designed to lead users to download a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7392

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/69dcb3bd4d74289f81c1d7d6c64debb1/10224340392.pdf In PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf22b397a1---15929099448.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a81940113---53249990190.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/k2a6omd7leqghiq44sv6t0jfoc/tebiwoxofupinisetutofego.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/13751826931.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/52603500700.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/50023908737.pdfIn PDF document text
    • http://2440027.ru/upload/file/43423929848.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210708_171950.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/ef1rhkgo5cl62253lbj87kvvk5/godelatekak.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/76319276916.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/goxuxadajilupakajog.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/gawexe.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/73859985466.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/fipexajukiroporavebir.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210505095209_1228044047.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/4e82c0669549a91d6637d97e3801efcb/lujamobozitawerat.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/faxatariwiguvaj.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/rijizivofilovad.pdfIn PDF document text
    • http://xn--b1adcbbai1bezln.xn--p1ai/content/File/jetubikix.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/63315289427.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ofg2fmor9mouu2a4tafb92b016/54928061853.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/mibufelejuwokiwizedo.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/67794148979.pdfIn PDF document text
    • http://myphamnanyno.com/luutru/files/46233918826.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=invitatie+la+vals+mihail+drumes+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00080d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D9D 10760 bytes
SHA-256: d8a29db761cc25848c7fe6aada4e9e56aa7134cc55000ca6c58d5d343deb6c51
font_01_sfnt_off0008261c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8261C 20608 bytes
SHA-256: 407bf6587f97218887aabe7846f5c555f01d11f07af28cd209f330b0d7c01552
font_02_sfnt_off000858e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x858E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1