Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf028dfcd5517d1…

MALICIOUS

PDF

85.9 KB Created: 2021-06-29 07:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2b7c52b0baceba41a307424c1a6c042a SHA-1: fff77d38c7e35a536e59773ebeaa85559c7ee039 SHA-256: 9bf028dfcd5517d1a8600eddafb6b9f6351dcf605e3c8b83eed893307ff30935
184 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. The presence of embedded JavaScript and numerous external links, including one pointing to a raw IP address, suggests it is designed to exploit vulnerabilities or trick users into downloading further malware. The document body was unreadable, but the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://sushibelovo.ru/files/waxewilipekupe.pdf In PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/poterer.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d506a5623d---48531936398.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/jesoz.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/levebox.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/11cebc57369e5c76779e13d7f8c055b0/80891913590.pdfIn PDF document text
    • http://burrburroughsfamily.com/clients/55468/File/konasekumoxazotaxanino.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608493f67c514---fesexilopexejotadabu.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160afa04be4bde---44928783759.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739ed901277---liwewabinuw.pdfPDF link annotation
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160757ab10ffe0---18547955891.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/557692977.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/8551d3767328d95a076c2096e41f326d/jofapazegevuzu.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/71663351489.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607496aca6fad---xaxipogedaxajasuxikexafi.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9cc7fe2b---79339528996.pdfIn PDF document text
    • http://giaexploring.it/userfiles/files/wavizusotu.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/54784084375.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609a14bc3f6e9---55096001404.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202167958302844.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/f8r3ub2cen9n3lro63hi76kig6/kaxamegazupawunujogezapaz.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772e6898032---fokoxote.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/nusofilolamosuzipub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=fique+in+englishPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADD 22252 bytes
SHA-256: 2c6b23b552badaf33b8fd61e48f4f104c888939a77f34983940ab87dbb52f149
font_01_sfnt_off000110a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A5 2616 bytes
SHA-256: 7a188a3e8ea3ad51732dbd90d786c08adc6daf935efd54c099d9f6ac9843c4b0
font_02_sfnt_off00011bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000133e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E0 10132 bytes
SHA-256: 49e433659122a89d55286fc28555f2baa3b9ef5d23468a9154ee405a79febd57

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