Malicious PDF — malware analysis report

Static analysis result for SHA-256 9daf7962c557e099…

MALICIOUS

PDF

76.0 KB Created: 2021-09-06 07:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 80fc744b261d85394114365b1eb20276 SHA-1: 30c23d19f021a31b0c7c3b4e8546e48af2fe8918 SHA-256: 9daf7962c557e099e18860dfcddf41a509f234f121c6d07049e8e49b9c73d64d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure indicate an attempt to lure victims to external resources for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pixomot.ru/uplcv?utm_term=2018+nissan+murano+nissan+connect+manual PDF link annotation
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852b9fe78d1---jurezevufobol.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/62430097222.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/3826jfr9vh9tk1b6kf7eccmtr0/98920210381.pdfIn PDF document text
    • http://wallawallahighschool1968.org/clients/75819/File/76611545012.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/845krlfri18pcsmrl8932qe5i3/49286098659.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3d346ad36---pulemuwuwozobufetulemi.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/84601555874.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/bilawutekugusok.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/dirivogopizezezukaxan.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/vnmi57nvbglvn3h79svoi4io81/jotixif.pdfIn PDF document text
    • http://chandravanshi.com/userfiles/file/tevazowawuw.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3b4c753ab---jawizeg.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/96131702443.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/rd8ad70gncoqi479fsj5c3vshs/kovuxegidiwu.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/29603338451.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/kamowomumuxijabobag.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/lbf2nhdu5460kf83jr9otfsevd/46827140579.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/dibawuges.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/8bf7d38c85a52a07ed2c4789974798d0/91239169342.pdfIn PDF document text
    • http://artepcb.com/upload/files/17469083676.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31ab1ecf4f---lorusideb.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/b54a9334f48b448701f24b1e298f5a8e/kejamewogepamebubujejirak.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/tmp/roneb.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/33931570076.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_off0000bf07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD719 19056 bytes
SHA-256: b851a555829e58c2ae5baabaf51278449bdd3f9c3483cf3b2902006262174da2
font_02_sfnt_off00010861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10861 10896 bytes
SHA-256: da73399568ab2a36f16f081e8a2ef07ee200a1296214ecfc2b8cadc7fddceaa5

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