Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae47a0c01f173287…

MALICIOUS

PDF

84.2 KB Created: 2021-09-01 22:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6cca59ec0656a6d5306dcafdf60f0197 SHA-1: c52c2ee5053da52c7c6b289efe7e4662a2f29d98 SHA-256: ae47a0c01f173287e3470ef4c508ef742cf246e25b18fc7c8d93e1cbf39067cd
156 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 related to phishing or malware delivery. The presence of external URI heuristics and link farm indicators supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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
  • 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 http://schmetterlingsgaerten.de/file/givilutilokufegale.pdf In PDF document text
    • http://tokyoracing.hu/userfiles/file/nidodafebe.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/jonivakipobatalakafor.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/busenokipamejopopan.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/javipabefinex.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/81668012341.pdfIn PDF document text
    • https://badoza.net/userfiles/file/40753189997.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/436j4rnc9jpst2gbrntjumvc60/37344337035.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161124f6f55271---nukiwaxonenekevodaxelela.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/venajatizikepin.pdfIn PDF document text
    • http://lbtech.kr/upfile/files/niduxeduv.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a563e73a0c6---kudetelibisabag.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6f04263a1---vaxuravavotubebux.pdfIn PDF document text
    • http://myxroad.com/upload/userfiles/file///56678253117.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/55394191305.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/vevudaririredememinon.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1d2ad7897---34194644355.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a973197706a---73577737227.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/ffff50b3519b0a7ba7e74d551a1d2a3d/8550371897.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/46430565006.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/bibijuxiwuzaxawatizoxujid.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f939817fd---63733697123.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fcf52e1e1---ganewafufuvagineboguzegu.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/sixorozukili.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/gutuwomezepijebuvojuzunu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+unlock+mobile+password+if+forgottenPDF link annotation
    • 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_off0000def0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF0 11372 bytes
SHA-256: 947489d1ae28136de0bc8b3ac7ba7ff5c089915776097d1d3bfdd4cef880136a
font_01_sfnt_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 18748 bytes
SHA-256: cbbca9fd66266b12cef820efadec08adbc7d9c60457a20a7d5c371bcf6639265
font_02_sfnt_off000129f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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