Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd552fd2a60939a…

MALICIOUS

PDF

70.6 KB Created: 2021-07-14 09:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9a0eaac83152a0ed0f4466995f32f7f8 SHA-1: 7fec1eed4ca6e3687795273c91b656c9f7bacaa7 SHA-256: dcd552fd2a60939a3f3d49ecb45ed567c9eff6e1caed614b1caa6e60c4c20c9c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting. These links likely lead to phishing pages or further malware downloads, aligning with the 'Spearphishing Attachment' technique. No scripts were extracted, but the structure suggests a malicious document designed to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6468

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://allytemp.ru/uplcv?utm_term=eye+strain+due+to+mobile PDF link annotation
    • https://discovercefalu.it/_data/images/file/gavufokipoxodifedoni.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6e104c826---44057683711.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/4d6fe275a25f1e37df4346d5fa381786/jekowoxenasezu.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079e1b943f13---57868211793.pdfIn PDF document text
    • http://mclarenquartz.in/ci/userfiles/files/85030463766.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607225af4b3f0---880212758.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/qhblp320o1eb3pf5orh10ung4m/kaduvefofise.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/56486423957.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/topamamudojazenediwod.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/jk9ib6udtaogmd7836t8nsj0o5/kokugabemiwumijib.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/79064751319.pdfIn PDF document text
    • https://aspirans.com/files/file/liwovifuwodimuwilo.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16071ddc55e012---52045019233.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d72c0e631d---75816836154.pdfIn PDF document text
    • http://tano-cable.com/d/files/98820132912.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd97936822b---86114483909.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/3f36a375286819ae6333beb6df95aaa9/6946327631.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e4f643b3e51a88d5caec22ad48885d70/wofazip.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/b18d901a78c1a647ece377f9fb47906b/sijeniwezuzati.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/73422169562.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/32478225001.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/67858272224.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160844ebfc0703---69613735298.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/a044a8370bbf39410bcee0cea4a4210c/49742560465.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/07uij3ch5394ao1aoivr37a4t1/zatawegesibenegadides.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AC 10744 bytes
SHA-256: b9e5ed9a35a9576c61f8706d4a0847dd2a8a22a7d27d9ada9927d87d88c2fcd0