Malicious PDF — malware analysis report

Static analysis result for SHA-256 adea0d3c90ab8ecb…

MALICIOUS

PDF

95.0 KB Created: 2021-06-29 16:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0d9d5115e46d49124753dc812807bf5a SHA-1: 37c3588c7fa72d16e1c32f51afd151f2ea0652f8 SHA-256: adea0d3c90ab8ecb439339b8a7a61f14ca417471a6ea69b27d2d8d595abb6e9e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features numerous external URIs, including links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://huntic.ru/uplcv?utm_term=snowwhite+and+the+huntsman+2 PDF link annotation
    • https://bursakaynak.com/userfiles/file/24863721059.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/13605165651.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/xuxudasizovekosur.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/74764097276.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/40670116006.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/52239783257.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/70229303022.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/s9677ve50l5u0j2tue3vq464t8/64052026109.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160885e78cd423---kamupejosaxuvusisazi.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/dd42fb14727a5e1cdb63f3a59a97e1fb/resuzowuj.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/xivazatunozumivasol.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/jnr9cjkpqka2agtp3bcf25l6n2/wiravinitanegibaxizabefew.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/d1f4fcbe29b642b3acb3f2868f9520ec/88422394990.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/16566287261.pdfIn PDF document text
    • http://garderoba.sk/images/_file/zosilarukaxowajabizosati.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/wogixusimolule.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b702518b0a---gapirokesovebimisexeved.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160888718d0466---datopuvubarabiron.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a945b2e6180---sotinuviwexonipovuwosur.pdfIn PDF document text
    • https://bataretak.com/img/files/file/75526063509.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa835e38ab---1844204749.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb71a40aa6f---14852401701.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/kf9vk17r2jprrbk6jmsjol5gri/lataxixominukawejim.pdfIn PDF document text
    • https://primer-spb.ru/files/files/18020994224.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/55465959919.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_off00010d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6C 18500 bytes
SHA-256: cba91030d1f10e51740825b1b80a8c64213776cc7803400d3d64019257e9e2f3
font_01_sfnt_off00013dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000155e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155E3 10748 bytes
SHA-256: 145cdc632c198ccece12acdeed1c3e3faeb2f4d331bececbe65ee30446668d2b

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