Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6004f45fee84d51…

MALICIOUS

PDF

78.4 KB Created: 2021-09-01 18:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: becb44176c19cf9c2843d85b847eda6d SHA-1: 238dc919d64f8d254ca6458c715f3445a14e4219 SHA-256: f6004f45fee84d51e23999015301c028977dab8d17b934e69f50f9af5990e7cb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://yomamasushitogo.com/uploads/files/78936092877.pdf In PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8af4edfed3---mafediti.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/zalim.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/35002628812.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6711893073.pdfIn PDF document text
    • http://protectakoteasia.com/ckfinder/userfiles/files/38436891519.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/77119064271.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/abd98ca0716f8670c46b47408075fdec/xadisapagefev.pdfIn PDF document text
    • https://pasarangroup2.com/contents//files/5164014194.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/gedumugutuxigoririfuxapo.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f54f8fccd---66940677380.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16123449708ffa---suvisibugowutafilatupar.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e67d04ac69---zazabivajeze.pdfIn PDF document text
    • http://kotolantopeni.cz/file/pobubexaxejepajomarifofu.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf63a1a621---zuropuxobuwibug.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/98721248357.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5281fe5bf8---8739363677.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/p3kphklu3kjp7uvpal1fjbutb2/98078575464.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/jipoxitof.pdfIn PDF document text
    • http://lakesideterracecondo.com/clients/41361/File/siwajurukupinavosogewu.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f325d4ec8---wobuje.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/nazukobilugoduboxumol.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddbd2e58bc---79232232670.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/14387216305.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=importance+of+school+magazine+in+students+lifePDF 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_off0000ccf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF7 17104 bytes
SHA-256: 0664a16d7a5ed225392413d89d82900b454d17793f1f7fb109d52848e95ae243
font_01_sfnt_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 11176 bytes
SHA-256: 2608e1aacdba9136d365fa7e489f24d2e35cdc9c52dba899357f0f7a9cb8dfa4
font_02_sfnt_off00011304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11304 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1