Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba9c3f7eb251be6…

MALICIOUS

PDF

225.1 KB Created: 2021-07-08 10:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 18396e58e90f67a5367bebd321bd3997 SHA-1: 0e7295728483b477a2c78da74a3e84f4ae1c5c1c SHA-256: 1ba9c3f7eb251be6c0e1acdeb7db760db473d7291d8afc519e24e995802f13f0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains a link farm pointing to compromised WordPress upload storage, suggesting it's part of a phishing campaign. The document body, though heavily obfuscated, contains heuristic firings related to urgency lures, reinforcing the phishing pretext. No scripts were extracted, but the presence of external links and compromised CMS uploads points to a likely phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9841

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nscs.org/wp-content/plugins/super-forms/uploads/php/files/d35a30d69f0333f357f38b71f61927cb/66904237234.pdf In PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/0b686bd48029670d349483861e38b17b/20514398494.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/lumamunirufede.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160998fda72d61---84988400410.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/jokizedinepomokogizol.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b12b917746---dimonisijegekowolazemi.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/ae53b06ecce2a5150b5a3d80397e1c8e/lebepu.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/79920146232.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/78641840807.pdfIn PDF document text
    • http://uamarkets.com/images/file/lajuke.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d44126328---bufizujez.pdfIn PDF document text
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/gezugumogatadamakoregu.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/7b04a5760b9d6b55de4a21c67acb539c/67645275456.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/aaf422035cda27a5ff6f7bc38b7c90f0/16387587012.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/l5qvefuc15f34bm8pkjstptp75/76676137190.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/38387757754.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160844d61ee041---4360750760.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087eb5566944---57525680578.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/kekebar.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19cc216b27---19794059764.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d797dfa06a7---94520678734.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160701708f37eb---vozamaj.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ep98hqge9sqcpmp3rijnqg28g1/sovalu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=easa+module+4+questions+and+answersPDF link annotation
    • 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_off000314d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314D3 17744 bytes
SHA-256: 3f12e6acf8baa1c164ea471cbfd105eb929c4002453b7b5c5c2fdb292cd24611
font_01_sfnt_off00034349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34349 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00035b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35B60 10804 bytes
SHA-256: 146a5996ec3e843a5fdb59f5e98be987abdb57fac54f7d02d5d4fc7c5f737979

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