Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fe27bf53f34c3a…

MALICIOUS

PDF

92.6 KB Created: 2021-07-01 22:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1ea9acbd417d1957d49a63337569c32 SHA-1: 491888777c8cdcdfa5ef94233ada76e798b576a0 SHA-256: 01fe27bf53f34c3a5dd9233ce929d90cd8363b6b30e5c01675399ba1483d841d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Several heuristics point to the document acting as a link farm, directing users to potentially compromised websites or IP addresses. The presence of numerous external URIs, including those hosted on disposable domains and potentially compromised CMS uploads, suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ecowaytechnologies.com/ckfinder/userfiles/files/wanuw.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095da48bccbb---gipiwubil.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/ffd53ef1e6ec13bc512bcd5f9780879a/85654502920.pdf
    • http://aps-mes.com/files/file/99468165443.pdf
    • http://zhengfutz.com/v15/Upload/file/2021523352245323.pdf
    • https://mama-light.net/business_school/uploads/file/wovoxagisubutugaf.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160947fef3b261---39824890638.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/8e901fe20f7c1ac061d2a6819b3d131b/zetawumiwatazas.pdf
    • http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/xugudexijuf.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7c02317db---papewobixa.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607835c14c244---67679288650.pdf
    • https://ltssinternational.com/res/wysiwyg/file/siwagonorotadorud.pdf
    • http://sahamit.net/userfiles/file/19384365824.pdf
    • http://biswasi.com/userfiles/files/gijodujuwiwagew.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/9hhpbk0fqusi82dm1q4je1493c/94002071439.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082b7bc015b4---14773727137.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/9b41c988ccb0ad139bef26bbea7cd115/fovurorebo.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/0dfaeb825b4ea66c3d945a1ddec4a66a/23617042864.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3589489104---52918521348.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a653cc8b5f1---mizitepaz.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607748b660685---1624226288.pdf
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/gusamirubagusimizi.pdf
    • https://zhansq.cn/upload/file/79254875315.pdf
    • http://orosweb.hu/ckfinder/userfiles/files/94011646823.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/06d9060d2d8f6a9ae6807bb134bd620c/87783807825.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=abstract+noun+worksheets+for+class+6
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103d4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x103D4 16792 bytes
font_01_sfnt_off00011beb.bin
f1b21f6c9f5059b190c1f7fa19c3cedc08e2e304f1513490d676e95509dd5b50
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEB 10908 bytes
font_02_sfnt_off0001354b.bin
dd42bf230a377c291153cf583758e040a32bdaa855a8d98edd4398cd7b42fc72
pdf-font-stream PDF embedded font (sfnt) at offset 0x1354B 17616 bytes