Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a69207db7004e9…

MALICIOUS

PDF

113.9 KB Created: 2021-06-29 09:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 62de77b4aa3ba15e9a68ab58c31fef71 SHA-1: 8c2ce4a75107a0b312560fc8339f2d15131bc111 SHA-256: 29a69207db7004e977835ec00ce563331b31ed3e0b4cea1e0f39dc0e2642d61f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm structure, suggesting the document's primary purpose is to redirect users to potentially malicious or phishing content. The embedded JavaScript, while not fully analyzed due to obfuscation, likely contributes to the malicious functionality by initiating downloads or redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 7

  • 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.
  • 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 https://searchkar.com/ci/userfiles/files/nagolikurijokovugagol.pdf In PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/034e16cde878754eab4cf44c5ae8e27b/3744597459.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160961bb46e288---jubolimajatakikevosowej.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/qlutscm8jatbae394tsrae9unk/88161539208.pdfIn PDF document text
    • http://www.irrv.org/uploads/files/81500896844.pdfIn PDF document text
    • http://kanstm.com/ckupload/files/46124319851.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b194b3e95---vodorozolivo.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c787524ab3---rikuresuwumoxaxisixipaki.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/jemefelunerigovowonov.pdfIn PDF document text
    • http://kme-kme.cz/files/file/94864297422.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/rsfaput6rbq2fg4lle2g57jnvm/robol.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/timawivisopazonunevuga.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/hc3tudr1p23cr08c09l0tp0or3/gikerolezabovarusugatuj.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/bedc39af925630b38329ee33baa3be75/fewukepob.pdfIn PDF document text
    • https://invest.pl/userfiles/file/83013370815.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/fe42b0f52436812bb659d17e1e026d00/54882014594.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/16396317012.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/pikudubepo.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/fapakusob.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/japuz.pdfIn PDF document text
    • http://sns.hu/_user/file/6047313853.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b83c6745b53---80157724853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=ark+best+dino+for+narcoberriesPDF 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_off000144dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144DD 17780 bytes
SHA-256: fbba707e776f118cd1e400fd330b01d3c4559afb83800437ddc03eff46063313
font_01_sfnt_off000173fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173FA 10636 bytes
SHA-256: 0fc8d4b38d1d9a67d7d226015cdfcb2d592b69e0fa6cea86c2babbdba887f693
font_02_sfnt_off00018c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C7B 16192 bytes
SHA-256: 97e3f73a58ccdd4784c9ae1678d9f90717e6b6d0c87c36bf93adb8865ef65ebd
font_03_sfnt_off0001a207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A207 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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