Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de11f3a3bb070a5…

MALICIOUS

PDF

82.2 KB Created: 2021-06-27 20:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f76063a961ce7874f4dac3504e162175 SHA-1: 688cd549e2a5a00a57910b7f36baab2a5e200fcc SHA-256: 3de11f3a3bb070a50c0bc000fd64ca8ec28c9fbcdd9e1889504843301c4fb6f1
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1071.001 Web Protocols

This PDF document exhibits multiple indicators of malicious activity, including ML classification, password archive lures, and MFA harvesting lures. The embedded URLs and link farms suggest an attempt to direct users to phishing sites or compromised content. The document's purpose appears to be credential harvesting through deceptive prompts, likely facilitated by external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://garglob.ru/uplcv?utm_term=sing+in+hotmail+com PDF link annotation
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160963c2449ccd---48423662845.pdfIn PDF document text
    • http://shiokuda1.com/contents//files/tuxusixategikovigajefetom.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/65334268913.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607588f03936b---fifebumivexadusivud.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16209667213323.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/c6924a25a88ab2fdaa29c5f52d1a0b1b/kusowebidapuzanap.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609850d969368---nuzobu.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/d26e2d38822caec687862d4fee844b4a/36408351019.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/b98381f6e752f420425cc4f37d734533/66867328526.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/zowimolim.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cc916470fdd---67913308272.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60b7c82616091.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/27adn2c8tnnsrgiksqgekqv3m3/zolinerofuvo.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/12027795071.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/78852456712.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/e29a6453c132c8791199f0612bc6bcc7/50719173543.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b663ad830f---misotepavukokujel.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6473e5c95---73542562418.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/76833ec86199540cfc6370085339612f/77665250881.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/2645641043.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/69732707732.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160881a5f30243---pozuli.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160859ea8ed8a2---jusiluzizurukowojami.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d19fb401ec7---48986389666.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/45957136653.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_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 16992 bytes
SHA-256: 198b2919f8fdf828c1b2e0de94ab40355b71809665f7161ce71dbf607e430714
font_01_sfnt_off00010c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001247a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247A 10352 bytes
SHA-256: ce8dd1ac6c2f4fd6b5e6023a98d8b2742eb1fc5bd8faeb4d4b21f4e0447d4b31

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