Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cea21c81aa9aee5…

MALICIOUS

PDF

82.0 KB Created: 2021-10-05 06:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 73d15b3dad02fc11f64c60fef68fa995 SHA-1: 06847aa5f4f3cb4dab76f9a9a9eb7149c4891d39 SHA-256: 2cea21c81aa9aee5e511c6fd5a1c8618f92f41e1245643d4af2abf1a3c2bb761
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body is unreadable, but the heuristics and URLs confirm a pattern of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6964

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://cructi.ru/uplcv?utm_term=point+to+point+tunneling+protocol+pdf PDF link annotation
    • http://pietroquatriniarchitetto.eu/userfiles/files/tubepe.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/47439619322.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/grbcbchhong8gnol80bpvbftos/70784230556.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/38308181941.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/susanebudonaxusodopev.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/lomuwixawulezexugaz.pdfIn PDF document text
    • http://hibertek.com/image/files/20210903_062551.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/69054188504.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/20097912006.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/25602861770.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/xitiwobevotetu.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/56255281449.pdfIn PDF document text
    • http://csavarkompresszor.hu/userfiles/file/xikefaliwomitipimop.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/75100448669.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/95438909872.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/65264060130.pdfIn PDF document text
    • https://angem.fr/userfiles/file/97911498242.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/zotokegeni.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/29660436763.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/9153897868.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/lokosipa.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/59443887842.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/d21894e88c11f62dc15e1946410e3902/79758483312.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/75616b4552626af0c978c37e061aab11/bumopaxoxerezujunuvomejom.pdfIn 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_off0000e815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 19336 bytes
SHA-256: 994f6f84c0b891a475f43158e2cd34577f694f260aaabb033ea89799c3ff47c8
font_01_sfnt_off00011a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001326f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326F 10568 bytes
SHA-256: a6af33e3fce202f5ec0f38ab8018de8780ff41aac857aebef202d36ffebb9eff

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