Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f958ceba4aa932…

MALICIOUS

PDF

75.1 KB Created: 2021-06-26 02:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb3424f67b04a54acde0a9638ab0a8d8 SHA-1: d067f0fb5ea1be418fec8785243d8f1809146c2b SHA-256: 30f958ceba4aa93201116db879793220a49932c9a3674da79bbbb8212e5cf431
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely to host malicious content or redirect users to phishing pages. The presence of multiple links on disposable or compromised hosting further supports a malicious intent to distribute harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/lihbkmkjr8o4reac41sfkmiag6/57242835176.pdf
    • http://soles2walk.cz/data/file/12484688211.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1f86b1b6c---famelexakuturuf.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/kvjrhoijst697dh6h3ipnd9fq0/16707189312.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087b3d92b41f---80842743004.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976a8dafcc5---93110864849.pdf
    • https://aashianarealty.com/file/zosuverifizalif.pdf
    • http://remaining-mc.de/userfiles/file/78587729893.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082af5455e5a---1363772790.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/95p3nrlm4hp6rutu7e1dtjetpp/15502436229.pdf
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/33502457750.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ttnfv7a2qa5ovlsb57v9k7kq23/lakezetigirogafupukog.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/nenuridekorevita.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ggnnhubnbvcnkuak0manva0jp9/2014450796.pdf
    • http://matstravel.ru/userfiles/file/55961255073.pdf
    • http://big-blue-bus.com/pics/fotos/1/file/16004889104.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/ced36e2d09484ec50f1a048204d7813f/69711619967.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cff005937---tezepisigogom.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/lptgpnnmnun16m0dt2lahj92jo/kepelibu.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a61cfe45943---jodebilidi.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa83ba16c9a---38082958164.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=pdf+pages+into+one+page
    • http://e1pl2.nazwa.pl/busy/fotki/file/liwigutodewipux.pdf
    • 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_off0000c225.bin
3a69f7b78c57da343b2456e8e5095fea9e492576be591d1d1cc4d25726775fd6
pdf-font-stream PDF embedded font (sfnt) at offset 0xC225 17708 bytes
font_01_sfnt_off0000ef79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF79 16792 bytes
font_02_sfnt_off00010790.bin
f9609224ebcf52bd0a4b5eeda3801c2260ede13c09c8b352325f1d2c5305ee2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10790 10528 bytes