Malicious PDF — malware analysis report

Static analysis result for SHA-256 002d6673818eec9b…

MALICIOUS

PDF

80.0 KB Created: 2021-09-07 10:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f36b0b099f0600d8d4db276442d64228 SHA-1: 76bc20adc109bd94705a6f3fe71433088b173ad7 SHA-256: 002d6673818eec9bd06abfdd08bfbbf558e34c9b9570d78c623d5180fe432ec5
154 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF itself contains garbled content, likely due to obfuscation or the nature of its generation by wkhtmltopdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5399

Heuristics 5

  • 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
  • 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://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608790ee3eaa4---58381632599.pdf
    • https://digireg.ch/upload/8970185858.pdf
    • http://gocep.org/data/userfiles/files/48228325618.pdf
    • https://natatourism.com/userfiles/files/dabajolobakuliw.pdf
    • https://arerp.kr/data/file///voratebojujotumiguzun.pdf
    • http://ebrinteractive.com/userfiles/file/nobodelalirimaxulefeduv.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/f69be7e757f9502326a61932dfe0aab8/zilaniramurekazorib.pdf
    • https://ost-fogging.com/upload/files/37690403032.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee161e5315---wanazu.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/e3cc8c1801d5df0b5c6355cae576f454/46547020151.pdf
    • https://clinicamanila.com/ckfinder/userfiles/files/gemibipelofibunogababofo.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/37fe8fa1c12550667f51803be0f67032/47002364636.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5793228569---86583922658.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102813794135---nurijasejidararap.pdf
    • https://die-elke.de/cms/elke_page_files/file/setupojutaxotowo.pdf
    • https://drivetripper.com/userfiles2020/files/karimadulasogepaworegeveb.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/6bfd5e1550ce1554c5f70ec1151ae5b5/zefilajebisedegejobepan.pdf
    • http://vytvarnyobchod.cz/UserFiles/File/wabozukoxosokobokuge.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/e0355771d1ffe72c608bd8450f4c733b/56038300359.pdf
    • http://geoplan.su/userfiles/file/2609586491.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/63441f0714a8ce3f5c41396bb0d39de8/9900266788.pdf
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/jisilizigijuv.pdf
    • https://burstallconrad.com/editor_files/file/79792079936.pdf
    • https://leavingcare3plus.ch/userfiles/files/35753468270.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a47b07a127d---84631798623.pdf
    • https://radiosmile.hu/upload/file/94618490864.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=aprender+japones+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f12b.bin
300232afccfe9f6589f17ee540f64dac6414a97240916167d59958443b49391e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF12B 10364 bytes
font_01_sfnt_off000108b0.bin
fa9b2c875a3bb60d455e253dd45389eaa88828eaa65cc6a05a38b1fc6ae568b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108B0 19768 bytes

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