Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d30b203dd52258…

MALICIOUS

PDF

78.0 KB Created: 2021-08-29 17:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 324a3350cc887224a8d37ed2a3a0fe8d SHA-1: df1d034aa4996dbfffd8968996439671028b45b2 SHA-256: 88d30b203dd52258ecfcd5d09a39db2ff1f2654497bc82c0bc873342be458332
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8512

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://krisoc.ru/uplcv?utm_term=true+love+is+finding+your+soulmate+in+your+best+friend PDF link annotation
    • https://agrilaui.com/userfiles/file/xufez.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210702_3FDCD5BD2B39FA7A.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/c51aa372adec6c1a5b86072274c87e35/zujozuwisasegapolaral.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/56259024643.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/26765207912.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f09c9c3214f678f616d4b1d9288ca475/fikarefakavokasovab.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/ca6ec923ae99c1f6550602ce01d3e422/66148293055.pdfIn PDF document text
    • https://ka-base.no/images_content/file/vuzanotuzudesusumaxuxexes.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/40ffd00e4d35109a06386e72fb01f566/zulisuja.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/49008617540.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/63711341477.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/017ca5ba698420f7c79119c645af9c64/loxoratimuw.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/23873970858.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/dupogojitesig.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/ratido.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/61916c92737c29e20a3d0fee5623d34d/1127716414.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/abb8b2bfea05b1e55562772c4f015406/zamogu.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/mekifapemilelafebabital.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/88039495503.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2cf5c1a70---xedotoditidasevatelos.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/87217066775.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9cf681b21---33442522980.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210612082127_94ihph.pdfIn PDF document text
    • https://mimpidia.com/contents//files/63299303717.pdfIn PDF document text
    • 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_off0000e8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D8 11080 bytes
SHA-256: e60d7bebd49b8ff613a0c825f6d8195c96a7802d9bcc3d880ff948c0e9b2192f

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