Malicious PDF — malware analysis report

Static analysis result for SHA-256 156379151e01ab59…

MALICIOUS

PDF

91.1 KB Created: 2021-09-02 01:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 94183fd891a4dc8a43e90fb405997908 SHA-1: d46cfc3de7318e7a0d35aff619b6369a64ee079a SHA-256: 156379151e01ab59266ef8faf58f89f06de65d82feed547464408727cb8b65dd
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be hosted on compromised CMS platforms. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://pistant.ru/uplcv?utm_term=track+and+field+positions PDF link annotation
    • https://bnbcostaverde.it/userfiles/file/33512558735.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/acf04a71c76f317eeecfee7cb378fc61/83898051950.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/pugajavosamijovopadiduk.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/lugurifonesumelowaso.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105030127052372.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec99163c2e---11562214665.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609438fe34e8e---sirejaxopifajipo.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/u95em5i5gjln6c3m5kaa6mj7u6/87638993032.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4de852084a---kirasobolafatojijukis.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/piluwadinosajugik.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/b3911f2db468cc15f5407ee596cd4e9d/pivugil.pdfIn PDF document text
    • https://voyageaventurenepal.com/upload/files/zokavazapesa.pdfIn PDF document text
    • http://stasta.com/userfiles/file/15370194029.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16090e057ad3a7---53147229226.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210525194643.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7824d2853---monofoxowetixama.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c6859914ab9---roviler.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606cafdf836b5---53844414969.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/17840751108.pdfIn PDF document text
    • http://tageedesign.com/ssmpt/documents/file/89500813864.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9e04edb39b825ee710381086a1855c39/fevedugoremuxaluzomo.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/gidizobogelun.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/putidetonafemozeju.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_off0000fed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED9 10668 bytes
SHA-256: 68158e3b62ec4a7e422b50d9e6ccd230ff65e28758a5f9e4e361e77591f7fd3c
font_01_sfnt_off00011765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11765 18376 bytes
SHA-256: b1ac0def304e0fca0d097a78ae6bc96a9247f2f885fa47070d677d6bbb7172d1
font_02_sfnt_off000146e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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