Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee7619725a8cf21…

MALICIOUS

PDF

78.4 KB Created: 2021-08-22 04:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc69e348cfbe47609ae8b64d91e714ec SHA-1: b33ecf684d190d118c8736eceb096618b7fa7e1f SHA-256: fee7619725a8cf2146caa7d63942a868453e7d0c2f220d0b7ed6104032c989c6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to various websites, including those hosted on compromised WordPress installations. The presence of these links suggests an attempt to direct users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://nomylo.ru/uplcv?utm_term=logic+pro+x+free+download+mac+2020+reddit
    • https://lasanisports.com/files/tifivukomunipabu.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/628f3ts2qo0175cbv8nrfrpab2/wopagedewoxikijetemi.pdf
    • https://wodgluch-projekt.pl/userfiles/75558865271.pdf
    • http://brezov-gaj.si/uporabnik/file/kemukikasorigaliridavoja.pdf
    • http://sendedianqi.com/upload_fck/file/2021-7-28/20210728172148158797.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609407f67d770---42754992421.pdf
    • https://cmflower-kkc.com/ckfinder/userfiles/files/88655026160.pdf
    • https://alshamiltrading.com/alshamilfiles/file/somovaresoxezatu.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/90618791830.pdf
    • http://morard-mcf.fr/data/Files/60914918718.pdf
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/darijitobadalat.pdf
    • http://omeofest.eu/userfiles/files/ralalati.pdf
    • https://driftwoodcc.com/userfiles/files/11693354987.pdf
    • https://ahreco.com/uploads/news_file/zilinamotu.pdf
    • https://zohopin.com/calisma2/files/uploads/rarulanebiduneroxanaduba.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/d4d4586bc743968fcbe779fc58c4cee9/53666855605.pdf
    • https://iwistw.com/upload/files/vesorebesijeni.pdf
    • https://lensprovn.com/ckfinder/userfiles/files/melelutuxunovujatigipilox.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/7ea8cfc1e3dc5edb6800849686ff05c3/72938579913.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/64209bb1bc1c7922973d71348f880e91/26929061450.pdf
    • https://gbagencement.fr/uploads/file/kakelulapaxitukenamali.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b489a8a9480---zakelusetazejitoso.pdf
    • http://www.pranabkumar.com/fckimages/file/dovon.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084478cddd5a---lozozilakalolob.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_off0000ce7e.bin
bf23377510f380578b5305d6b3e5c93040fe8fec096ea1682f51a8c7837a4dd4
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7E 16732 bytes
font_01_sfnt_off0000f9f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F3 16792 bytes
font_02_sfnt_off0001120a.bin
27a5717f12c2bf841b819ddf88f8ddfa443b17b0182ebea9d8c41a340b209ec6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1120A 11180 bytes