Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc4a2524c87e03f…

MALICIOUS

PDF

91.6 KB Created: 2021-07-08 12:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 80d6194af8476c86c451a99ffc3143ad SHA-1: d82543e231e447ba0e9cc16171e08adc8a35ebdc SHA-256: 7dc4a2524c87e03f514d7a716f1b7401d425e56753f7b90ecdcde7de7b313d5a
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with 'utm_term=download+fall+guys+on+ios' indicates a lure to trick users into clicking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://willbramephotography.com/20306510093.pdf In PDF document text
    • https://sca-kc.net/scauserfiles/files/29200532240.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/92824944180.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/dd7a2f80e8b59b23e1ba3167b8cbb2b8/vumamupupedugilos.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/narivujifa.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608521e3a4a7a---fijamefuwagexitera.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/4db0d7ce1ac373c701e643c1a181520b/10223780523.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-18/20210518080514203108.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/b8ebf87e7f42dc53bd112b4544c28501/18096030710.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/8e652710490bbddd6d33cf5e882ea06f/balakizubaku.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/neruzukukironulelagis.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7b91c6cde---xevuvajedanesologamut.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/422258d1557190087e0368dd71ee9c57/25817232725.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/85050855226b9e20d2cb8ae19a348581/11879121634.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/88825224260.pdfIn PDF document text
    • http://nensi.si/upload/file/nabawadununukirelujekupuf.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082a82355031---kivitukokurevumivileben.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/vawibirisedimuduvul.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/48290979337.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/17783357997.pdfIn PDF document text
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/69512482747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=download+fall+guys+on+iosPDF 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_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000116c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C0 10500 bytes
SHA-256: 63778c95a225aa362fb378e4ecc282a6e46baf02b1b34a4d5cb5921f5d908f8d
font_02_sfnt_off00012e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8A 19996 bytes
SHA-256: e74abfcb695e8613aa6d5b13dae54049ef1619577bb9ba8cd34cef80bf3c5adc

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