Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0edb5661245ae4…

MALICIOUS

PDF

87.6 KB Created: 2021-07-19 20:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0cd3a406b3d276c48097e85c70f215f0 SHA-1: 40cdf0cd9ffb37515a9d2e4b12fdfa5ee313fc57 SHA-256: 2e0edb5661245ae45918911fc184682d5edfb864a79fd89463e54492d7a03e24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/91b13c1d2517f5098e8d833dba79583d/nurilokulexibis.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e7bdc90fd---4116038986.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/04050304be0ddc26a75dc65a788698d3/34037442663.pdf
    • http://computer-rudolstadt.de/upload/file/3720376445.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d51496be82---86014824524.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/o4da2rdjnhr3bsl2naliafojig/suvujupaj.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e6a82048430---98646866905.pdf
    • http://brandnewgoods.net/userfiles/file/dezosijevigifozeji.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d50708b66a0---78581368024.pdf
    • https://biothiennam.com/media/ftp/file/32342729824.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607757116a3b5---8762452988.pdf
    • http://akssert.com/userfiles/files/82449099649.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607741b36f973---lirisubuse.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/b4e4c1b37f9c820648d1f00bcd761228/53105075224.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/fghtfs15dl4e8n7r24nfbgeqdm/9401354581.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/qgbcdsevjqpm0nmg618p533vm5/91669665456.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/3ogor1f9edbvsu53l0amkcm2o4/lukej.pdf
    • http://accessiblevehicleservices.com/userfiles/file/70922111701.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160be00375352e---kugiwomoso.pdf
    • https://bandotrading.com/uploads/file/30539787524.pdf
    • https://anjingliar2.com/contents//files/63972501995.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f8366024f---guvuserufasalejotekerif.pdf
    • http://areaengineeringsrl.eu/userfiles/files/toxubowebewumowusozul.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=sam+and+dean+in+heaven
    • 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_off0000f69f.bin
893fa153c22d3cea1616d7078918ab4dcfa956114a83982d27654a42d41336df
pdf-font-stream PDF embedded font (sfnt) at offset 0xF69F 10120 bytes
font_01_sfnt_off00010cf9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF9 16792 bytes
font_02_sfnt_off0001250b.bin
e1433237f78f89ebde5d5b74f8cd8abb57b983a117195af0fb965703bee04960
pdf-font-stream PDF embedded font (sfnt) at offset 0x1250B 16860 bytes