Malicious PDF — malware analysis report

Static analysis result for SHA-256 e597335f283b0064…

MALICIOUS

PDF

81.7 KB Created: 2021-08-06 23:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 050ded6ac0a088ca97a0cf47fbd51ece SHA-1: b796d3d9878c50c1ab908866e8683c463c18e5fd SHA-256: e597335f283b0064a1939f591307758467c51a293c6838ad8978988a3ac0906e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://debcopharma.com/userfiles/file/96172741373.pdf In PDF document text
    • http://wabasnb.com/files/fckeditor/file/130879447460c99e137482b.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/28f87sb0v0489l7e35v5f350kt/pekaraperasadok.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/itrv6gs40oijj7e25al0fuhe0m/fugonatutinuxevo.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/2748130f220019dc39f23c80c229d505/58954750115.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/55963191203.pdfIn PDF document text
    • http://revtechnik.cz/userfiles/file/zekujaruxonapuzu.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ecdf0947e---13924930450.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/zoxaturoturezumex.pdfIn PDF document text
    • https://littlelightnepal.org/userfiles/file/54582933092.pdfIn PDF document text
    • http://nmglyxx.com/userfiles/file/63430945594.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/cb69720e7fb67ddbd34b8f3e2b372740/mawetakubika.pdfIn PDF document text
    • https://antae.be/app/webroot/uploads/file/68085316868.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/8a68c2fdc42a1ac8f67a1578a8dc5730/86130862827.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096f3d0d18ff---56505446021.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/3922485311.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160f125d993cfd---80867705243.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/9150838010.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ed64d2d4d---madijoxavojumegizakirin.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160997c7d4bb23---fipavimaseredakiwu.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/duzonesaved.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/gexubilafazegenewuba.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/betedikemexegiva.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2a036ea750---51465698584.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=notas+para+flauta+alabanzas+cristianasPDF 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_off0000d9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C1 18056 bytes
SHA-256: a5430f42679e8231469263c45c3a641d33d566fe459d0dae167685d373e7a805
font_01_sfnt_off00010735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10735 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4C 10616 bytes
SHA-256: a3465769f6e9dc1ba251db8a0c90f03da4588e4507e7ee3aa562e64376b97258

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