Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e1217bbbf02092…

MALICIOUS

PDF

89.8 KB Created: 2021-07-23 08:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d034bbe6491cceb73b39aab1f06692f7 SHA-1: 2283b32fb3f852932eaefdccd3a504ad79a87a95 SHA-256: c4e1217bbbf02092e87c4a8fef6281b3dceaa096265ab2cb23b1c6ba070fcb57
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.gonouvellezelande.com/files/28105511149.pdf In PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a290abf17dd---92085294552.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/4586e3528f08e789380d4a6cc4957445/38917938884.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d34222a95e7---biximezup.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/nfof7vjok3j243t0sqg3sdmmd6/54963961983.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/72079455406.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862ad09cbfe---11197804548.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/63771270026.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f1d2973aebbd9cc342ef1f0802ac4712/wikuboje.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/41128602252.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607891ae82248---24782944646.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210515105413_957159452.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/77747543069.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ace8be9eb13---simegotupamusigikuzedida.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202106file/2021063010060270554.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/mezalojiligexajene.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/fafaxuw.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/73134635093.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/63c07b4e81b3db07b32057435777101a/runariz.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b31703467b---69408343154.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/87318305441.pdfIn PDF document text
    • http://budka39.ru/files/zitorovam.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/9808441963.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/fojoxokevoxodavobagexe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=ever+after+high+books+read+onlinePDF 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_off0000fcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11505 10912 bytes
SHA-256: 8e4f6d24c52f121ad651236523ac459b0dac2cee6a0a8262ebdce62f853c3fcd
font_02_sfnt_off00012dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFD 17016 bytes
SHA-256: a6e8b8daf61a0d20b740aeeccc60f9c4d1144c36240a40c339f0e78a8a6b79ae

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