Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cf47cf9c0f49a5…

MALICIOUS

PDF

83.8 KB Created: 2021-08-24 10:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a841df65b08d36f0ed148f5bf2a2363b SHA-1: 07b7236ffe64556f1297d0dcdd66c9ea863791b7 SHA-256: 08cf47cf9c0f49a53acfdbab1f1b14ca74b7e5bedd54b6f2b630ac0aa921877f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites for further exploitation. The presence of multiple external URIs and link farms points towards a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://olgunbey.com/upload/ckfinder/files/66364350194.pdf In PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/xijuwakidifiwogov.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/73911576435.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b0b5df84f---lidagerir.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c47a16724---lapufuzo.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/vofapabalaxapuvoti.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/oc92h0n9s3f4t9mmhrnjd5oknf/rabipefafazane.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/zidejogugasil.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16096e5e5cf35d---59304205015.pdfIn PDF document text
    • https://yellowstonewildlife.com/todewi.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/pigitisiponojebejajoku.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210528_0CE4A2F279A211F8.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/fizugalin.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/f976844de168b70f4ea135e371a56ebc/1862846516.pdfIn PDF document text
    • http://polins.org/public/userfiles/file/zapinosekexotututapube.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/bc342936174923fea9b26bcfcb69ff0a/tazumerasobimeranulifoze.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ca2if4p7l7r4eofs0gfics51c9/59047243497.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/90904012069.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748032d9a95---lepatoropadusagukebegolaj.pdfIn PDF document text
    • http://www.bash.cl/media/file/80587925744.pdfIn PDF document text
    • http://rfaaa.com/UploadFile/file/20210806115756100.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/2550l3ifk3b467m8nvg8uqiqqg/turelulukodezudit.pdfIn PDF document text
    • https://ewt.cz/res/file/nujovuwiwidexisibatik.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/xegon.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a2b25adb3aa2949780c4d1d3bb37f160/tovavafatenatinusuwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=dairy+farm+project+report+pdfPDF 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_off0000e404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE404 16980 bytes
SHA-256: da4391b818aa125bd5192fe6dc3c26fd7b993ccad5e034c48f14dca170d83854
font_01_sfnt_off000110b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B7 10708 bytes
SHA-256: 3b18210d0bc374beaeec747b28f1bc8faa8b74c5b464d91a73d54204bd31e17f
font_02_sfnt_off00012954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12954 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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