Malicious PDF — malware analysis report

Static analysis result for SHA-256 e012281d9964ebbd…

MALICIOUS

PDF

89.8 KB Created: 2021-06-29 00:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 52dcf76ab84505a5c4a73c97c51a53ef SHA-1: 698e05d18cd4e57a5bf6806f2f05084efd88e54a SHA-256: e012281d9964ebbd8593956cd9c1e8250e85244c6dc77e457fb4aea6585e201a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised websites or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to distribute malware or engage in phishing. While no scripts were explicitly extracted, the PDF structure and link farm nature are indicative of techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://ludifrance.fr/userfiles/file/luduvatatogej.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/p25ahikr5kld8pgup47nrc7v61/5249466830.pdf
    • http://vmkmsz.hu/userfiles/file/kowovav.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/16b0ea17f102eae506130731314c254f/rozumezudita.pdf
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/83760592987.pdf
    • http://cortabellanews.com/userimages/zuwilivujujarunapitupazaz.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/9530a168ac09b8287888b7b48a359e8b/fetizakivinuzesotojuf.pdf
    • https://arichaindia.com/userfiles/file/31901466367.pdf
    • http://ktcz.eu/files/files/famadowiwuvodesiwor.pdf
    • http://whscardinals1963.com/clients/9/9e/9e5fab02d16e7113a74bdd4e7828f974/File/fosedutetimabe.pdf
    • http://awkontrakt.pl/ckfinder/userfiles/files/6874765089.pdf
    • http://ronniejoymemorialfund.com/clients/1/1a/1a75100f29d804137a154ca93ef51a80/File/dowoxavosidevu.pdf
    • http://texasstatealphaxialumnae.com/clients/f/fe/fe72632f573fdc77cca6b85875c63e8a/File/jejebaruzonubefoxumezobod.pdf
    • http://salon-urody-bellis.pl/images/file/pajefolipibefesapuxu.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d06797e4478b8db9d756c955b7bdce08/megoxexaroxuvogamudazi.pdf
    • https://ises.ca/phpsites/vertical_living/uploads/file/12086900016.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6adac8d69---39911090629.pdf
    • http://vo23.ru/upload/file/gijes.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/khiv5p8lenh6pm6v9ebadslnn7/84166000609.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4c26f1543---21578560971.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fbd58bbb1---xeredovif.pdf
    • http://hoaisonland.vn/upload/files/jenesutaguvagi.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16079215097caf---tozepisomuvifalodosedi.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078871ad427d---kiwapikawivuzasivimafatud.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160704283ed1f9---55519466578.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=nursing+diagnosis+for+medication+noncompliance
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f09c.bin
761fe7945c7df178a6ead2464e3d04adc090ddd8a723ff4c0e839b217c7bc5c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF09C 17016 bytes
font_01_sfnt_off00011cea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEA 16792 bytes
font_02_sfnt_off000134f7.bin
e5815aa9be6bf9d6dc57543bc0596c97c5a5204a6d49876b6b0894aeff2afea0
pdf-font-stream PDF embedded font (sfnt) at offset 0x134F7 1884 bytes
font_03_sfnt_off00013db9.bin
2a49fbc837fbcc4743f830e607139fd819aac6cac00afa6639d806cdc2400a4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB9 11040 bytes