Malicious PDF — malware analysis report

Static analysis result for SHA-256 296194f3d00840c1…

MALICIOUS

PDF

74.8 KB Created: 2021-08-29 09:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7f7ebf80861f43872f5d73c785c415a3 SHA-1: 80e7a69fed75eb9be33e108ead2e5146c58383d3 SHA-256: 296194f3d00840c14600759c647b033eac6900c6e6cc348b41c20efa72c88aae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8913

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 http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d38f4a3abda---14788559919.pdf In PDF document text
    • http://vinhthuan.vn/upload/files/98159579508.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/48254525049.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/luvipevaviv.pdfIn PDF document text
    • http://splogservice.ru/content/file/posixowivujol.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/wivifuramotinelixabujama.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/70792790578.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/87625675610.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/162951522648941580556.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cceafbfa33---jisigabi.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/6c509e28ea0a45421cbb2eec77ccbb91/wawuwodo.pdfIn PDF document text
    • http://ahchala.com/img/file/68890338650.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/vetitosuzapigut.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/zokekoret.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/04cff83a3b23256de51b842f0a1e3584/13601282339.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/tkhu55lg91cu9rednaj5prcte7/xokuliwukusikuzelepu.pdfIn PDF document text
    • http://saimiri.name/upload/file/fivawoxumut.pdfIn PDF document text
    • http://yoga-privates.com/yoga-privates/file/ropixepedutesitebijivufel.pdfIn PDF document text
    • http://drprdesaihospital.com/uploads/76216571359.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/59180793242.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610825aa9847b---82619248781.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/ojr7nuh5vm8u53l7kmso19neh4/2542709795.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=airpods+with+tragus+piercingPDF link annotation
    • 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_off0000d308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD308 10916 bytes
SHA-256: f6512c95e6d4bf8c03eea50e33731a2503eaa8e71a8512574f6cc5a3d4dda68a
font_01_sfnt_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10434 16888 bytes
SHA-256: bc57034cba6ba334e534a88e3a34bd0cc4bec9a2d9ba998189f09358a46cd4ef

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