Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b214fe8f54b462…

MALICIOUS

PDF

83.4 KB Created: 2021-09-19 10:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 31233955a17b64d76eb1ff17be795e76 SHA-1: 240343ef2db4d2ee94fe2b08fda9258cf6148c45 SHA-256: 74b214fe8f54b46251b5514eb8adac30573e91f7af5039d7a909e28cd23d793f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The presence of a URL with 'utm_term=translate+app+download+apk' suggests a lure related to software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://allytemp.ru/uplcv?utm_term=translate+app+download+apk PDF link annotation
    • https://0286869143.com/editor_images/files/nujof.pdfIn PDF document text
    • http://abwessex.com/uploads/files/labajolozaxivusugu.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/56822645485.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/zikid.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/40876526872.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/94502074686.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/dogute.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/degamor.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303d858e153---tanimitu.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/62657215087.pdfIn PDF document text
    • http://yongchengtech.com/uploads/files/202109190728316100.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/bisadibadikiwonesutom.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/befunomirunigukasotunapa.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/4995758735.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/88669634285.pdfIn PDF document text
    • http://poliinc.com/upload/files/18588399861.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/momewubozes.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/11489492845.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/ac8be5d0eabe6dc465f88f371a6bc90c/jexikalekaxesip.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614037a3c34ca---64367033928.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161312f6e4d2e0---dakojitinexomomozewanopi.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae3c2c5067---kekadikujapaxujaxaxif.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/zedukonoriwubu.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_off0000e219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE219 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2B 17504 bytes
SHA-256: 0530d1d83a02523cad442edc981adf2947841ab6a236e8c1896943c83a26f3a9
font_02_sfnt_off000127e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E1 10432 bytes
SHA-256: e588e00718d895b5d3ca68d5ee6e13c978aa8294fa4b31784749a990f4b6eeb0

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