Malicious PDF — malware analysis report

Static analysis result for SHA-256 5294fba1fa28168f…

MALICIOUS

PDF

93.6 KB Created: 2021-07-22 10:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 64fa9a833424ccf1689cf7d9fed7de17 SHA-1: fcdc5d601e3f93ca614cd300669cec496209eabd SHA-256: 5294fba1fa28168fd727f6763e2ab1ad7a65976e4bc3a940135ca4c3e4db61fe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs pointing to compromised WordPress sites, indicating it functions as a link farm for malicious redirects. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate these redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4120466b9---89289478771.pdf In PDF document text
    • http://doo-san.com/userfiles/file/20210630091659.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/s59340tumobg47pi5bm7tem2b8/vodepexod.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4450543a2---10856614303.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e750c03d23---19806947017.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/wajefimavogifukoduderoza.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/0711c1eacd3ed42fea55e6af2fd37273/71272184808.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/25657768276.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/53707483138.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078723a57fdb---11064873219.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/f55f2a79b25fac794b495645a5071842/nivanu.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/5f08d7702e9cf3c6006b42f207e9644f/nileguzafuz.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d23fec5fc4e---limuwuxudob.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/836b9baded0a2a2ac87cd168fbf9af30/97087849068.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/luxutuvefazuwotiwew.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/c647ec967ce119dc332c5e69037e402c/6812677532.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/85058717363.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/ramozananekabasu.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/xaposukokatowafen.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/td3se6p6abco9k4oanksu4cgqr/niberowukapebeliwopekabe.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/5cd642e2794f83e01e434a02ea015bc6/41890806653.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/85595286124.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=sf+bus+systemPDF 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_off00010a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A48 10180 bytes
SHA-256: 043a072c826a766aeea1ecd08015f18c072b1e786fec55e8693ddc1fc15f592b
font_01_sfnt_off00012139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12139 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001394b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1394B 17640 bytes
SHA-256: 273b54878f6ff34a1fba889d0e59964b5b976904921a1abb2cdbe5e6ec4c22e4

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