Malicious PDF — malware analysis report

Static analysis result for SHA-256 67eccd88a9216304…

MALICIOUS

PDF

269.5 KB Created: 2021-06-26 23:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2fb5ab0251193d3206dff7f1bbe7d24d SHA-1: aa6654eefe00b9e4f9e186731ff7431c6c4d339c SHA-256: 67eccd88a9216304dcb4e448642c95a5d9cef7c9bde94f9f27923209d66bedb1
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it's a phishing lure, specifically mentioning urgency and fake invoice language. It embeds external URIs and links to compromised WordPress upload storage, suggesting it's part of a phishing campaign to deliver further malicious content. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/8j7t1i4sg8s82m6i8ouos31ep7/12416169140.pdf In PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210531_EAEEF5A61367881E.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/6680747242.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/1ee5dfc9d042acc041079aca3096ef27/gifakifibilerimebakologa.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/dufabodon.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082afa1a5732---desal.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/33df8de7bfdf4ff07400d2e6b6213810/vomapimedobitiwatuleza.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/18020974540.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093bd250a7b9---tazurufij.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/b71knhn48guolhfpinqgq53hbe/49565005026.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/23511096311.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/65395488838.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/7oapi35v2oitml0v6718f6nnat/dawipulewisomalu.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/14bebbda5d11ebde1a2d00e9bbf0dc49/53139543279.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/7g25j46ue7ddtdpl0cv4t0da3q/biwijasaxamaw.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/lesironewajesamuk.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/7c48b9cdbd1bde2d2e88f237d3af39e7/32404915786.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076eb2370e90---77408070006.pdfIn PDF document text
    • https://ecoretras.com/file/makupolesibidufotolak.pdfIn PDF document text
    • http://chiron-ventures.com/chiron/home/img/upload/files/210623042613742084snpbl.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/qj8ggsncoojbr2pd7puk5u01td/67652498916.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4edbc5db3---tirasus.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16081b8ef9bb29---nobaxemoturu.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/43479986603.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/4789b16678c9d5f7b9fd9055284caa97/3097763020.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16084df33eab35---78052050493.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=coal+mines+provident+fundPDF 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_off0003c3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C3B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0003dbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DBC7 18480 bytes
SHA-256: 2313e4cf5c30907a4cdc8ce1becf7d8418bb20b58ac7d52a219bbbcc29c4555d
font_02_sfnt_off00040cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40CD7 10856 bytes
SHA-256: 628f764e055c1b6e8535b96f92c3db71b176e72fcc5ef99fa658c61fc048849a

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