Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a17b842e98e909…

MALICIOUS

PDF

83.7 KB Created: 2021-09-01 00:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f346260583b317e4a2d0b3694d9d9400 SHA-1: 43d41b07e8a8ebc1e26df0ea24d7b255bdcb0408 SHA-256: 60a17b842e98e90970152637b2c1753d454f166c29fb9516c7788a71221bba54
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host phishing lures. The ML classifier and ClamAV detection strongly suggest malicious intent, with the embedded JavaScript likely facilitating the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 https://krisoc.ru/uplcv?utm_term=professional+powerpoint+themes+free+download PDF link annotation
    • https://codecs.ro/images/file/vufafovanorakuwekobasuf.pdfIn PDF document text
    • http://nprofit.hk/userfiles/binapuvefe.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/879247284f84d4de95781e7feb5eae68/31735129355.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/957a3eae5fa5b8a5a6b21d9773f84775/vexowilenorivaku.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba36ef65909---29698548949.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/fawivizovetokuxazojimekum.pdfIn PDF document text
    • https://tcremich.lu/files/files/wenoxukovebewakatimeke.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/ribalasiwelapu.pdfIn PDF document text
    • http://parfumkin.ru/files/files/54374606974.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/jaxezekaximapotujo.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/2336715505.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/57634511923.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/32649868910.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/4a48d6b6j9lr3q79909f0u6v97/55328596009.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/misetuwarug.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd5d893b65b---92973244478.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/33599989111.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/dudoxelomilofonuvanolopu.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/1f9c21af0a41765c0c3c561abdaf16f3/2561038779.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/4kdcnpfu5tgrdc1n704lo5ekuo/ributojebawevepiwasevizo.pdfIn PDF document text
    • http://brownmahonefamilyreunion2015.com/clients/7/71/71b8b7811cafefaf2288418346dc0658/File/livesotidojutaselat.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/d6cc3f7c90bb8cae04f39bc2a6e7e8b9/gegodufekobawusa.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/kukudomixar.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/488a8b6856bfeca5e3d565b937d837b9/pemugomulitapi.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/56841618822.pdfIn PDF document text
    • 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_off0000e00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00C 18244 bytes
SHA-256: a441c4d450b9d74fa86dfce95b991404acb19e504f436b6dfdfe7f252c842266
font_01_sfnt_off00010eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12716 10852 bytes
SHA-256: ab2e12b2225024dc5c3aa689e3e1fb41d7fbab456d38fdffcb4cd0527ef73350

Open this report in the interactive analyzer, or submit your own file for analysis.