Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fcdc150dbde9d1e…

MALICIOUS

PDF

86.4 KB Created: 2021-10-04 22:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ba6a32e5537326d3b062996c827d77b6 SHA-1: 9acb6d1706f4181f9bd0ddff6d15d83533dbe0de SHA-256: 9fcdc150dbde9d1eb3820bc39291d659bd5aa34d8bf3a449091311a725a9b24a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • 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://philabc.ru/uplcv?utm_term=it%27s+been+a+long+time+without+you+my+friend+lyrics PDF link annotation
    • https://standsimulator.com/ckfinder/userfiles/files/besumekes.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/sosabuketamodezakejuf.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b38239ac69---99507457635.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021103851329283.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/52905620753.pdfIn PDF document text
    • https://efsanepin.com/calisma2/files/uploads/88895706794.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/lizofefasefesilemaf.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/goxakosivatokejitelu.pdfIn PDF document text
    • http://appextskihjthj.handylover.com/upload/files/36287983623.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/2cf8e2e99e4baa1c5220b8c5adbc58e1/98859627998.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/17665565628.pdfIn PDF document text
    • http://labradory.pl/file/jefagiletadaze.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/vevapubemagam.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210901212011_lp7s9g.pdfIn PDF document text
    • https://kristinanamaste.eu/files/xiwupogid.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/11758111368.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/duwepejulujamamelusapubu.pdfIn PDF document text
    • http://canadianrockies.info/files/file/72377650561.pdfIn PDF document text
    • http://gdfsztal.com/uploadfile/files/95203263457.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/tosevut.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/72375414419.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/japivowej.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/jusiwewimujewiguxufivu.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e7dcca3fc---38523002901.pdfIn PDF document text
    • 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_off0000e7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AB 19204 bytes
SHA-256: fa752c645233f50120cbeabe7c161f8aea6e48d0d6bd3a054154e3b1aa4314e7
font_01_sfnt_off0001194a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13161 11348 bytes
SHA-256: c1d16ccc098acf1734ca46902768e7d9604fa5ddf8a1f01d6ef47a3e785e789d

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