Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ae8e9a8daca4af…

MALICIOUS

PDF

91.8 KB Created: 2021-06-26 23:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5a9edc3ff3d9f8c371e1eda74ec6e423 SHA-1: a0e2628409357a858c3aab0ac163e3c04cf00b14 SHA-256: 06ae8e9a8daca4afcd3cf332aa9009a991e8b8693d629a384edf5061a7f166d2
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. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and external links are indicative of exploitation or redirection techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/854u92n8m3h03a31r6npl9ul0t/gugofu.pdf In PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/lejovanawesikugopip.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/28690841546.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/f34cfeks540ehs1k87l6jpjt42/87782096388.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1609336b09c9bb---9580043020.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/m3oojdt7jbc7fn6tk38ffph234/10018754154.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/92701423651.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa1e2ab808---xapatawulegumuxa.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f31143c5dd---kebofupo.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/55216304179.pdfIn PDF document text
    • http://cwesp.biz/upload/file/womuxoxuloxi.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/26753106756.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/robifezinerafa.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/muzexi.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc2575a051---46215213136.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ruh65gbeqvatc5ep479u012av0/863786994.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/dd54c63a4bbc5f9c76ca11d06bb9c9fe/kofejeriguvexusuzaf.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/3ao95t3jhh09q49fbk9o8acrm0/80016933582.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d35b16dff13---1080355190.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2417d9732---najaka.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/6anvp952cokdc5ad8njq437rv5/juregotapupepepi.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98a5447dcf---52283915446.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210528102740.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=gld+stock+price+todayPDF 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_off000101d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EC 10648 bytes
SHA-256: 4eef254348c86e9685601d380c1fbe05c4a05dad2c2f5a2455dd3a6b35bc0ee7
font_02_sfnt_off00013279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13279 18300 bytes
SHA-256: 558eb29e66a9e5b367befc423da7218b803047ea1c60249dadeb94207d1ca139

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