Malicious PDF — malware analysis report

Static analysis result for SHA-256 574e89a90ed5270f…

MALICIOUS

PDF

68.5 KB Created: 2021-09-24 23:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ffbd1ad20805ce9a37fc9fec12cc739c SHA-1: a34effd3f7954aa28898635759977d413ddafa68 SHA-256: 574e89a90ed5270fe0879419715c0d7070e5872fb9035205f6929a19449cca2d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV confirming it as a phishing trojan. The document employs an image-only lure, typical of phishing campaigns, and contains numerous links to external sites, many hosted on compromised CMS platforms. Embedded JavaScript is present, likely used to facilitate the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://whiteplacard.com/UserFiles/file/nefemurixilezon.pdf In PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/eb6eb41926869dd12db25c11cf90d9bf/nogifebikav.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/31040966659.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14034591654.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4503f3f5b---fafunujeludivijebufura.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/62390477581.pdfIn PDF document text
    • http://hillcrestneighborhoods.com/userimages/1103168562.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/dkrcfljl9ba093bob0nasd8sll/julozixemowewofe.pdfIn PDF document text
    • http://mhzsolutionz.com/userfiles/file/fafatuwizix.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/25288127137.pdfIn PDF document text
    • http://snkpost.com/fckedit_file/file///20210903_19_37_44.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/vasixezasetuvomapatupaf.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/e9fnqvepi1a9mttgu8hv26lfjk/8297420648.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/30703066439.pdfIn PDF document text
    • http://tw-jia.com/uploads/files/202109131220263550.pdfIn PDF document text
    • http://myredm.ru/uploads/file/6035339770.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/62286255286.pdfIn PDF document text
    • http://hmed.vn/upload/files/19853304529.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/e3118cfd78e09c56040f8a5155dfdb2d/2115582098.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/vefiraregokewumokogibuni.pdfIn PDF document text
    • http://naso10.com/userData/board/file/pedegopilaxupidifosigalif.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cee8d09233---32936901963.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/bubiposi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=knox+3.3+api+level+28PDF 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_off0000aee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE5 14444 bytes
SHA-256: d0160294d1a17010a4f669571af7d374d399f28452eff4ad3557b12a836090ea
font_01_sfnt_off0000d293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD293 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eaaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 10604 bytes
SHA-256: 7ed2ca894396f9debaaba5e11991a0a1d88854b89458ce7756bbba62b38892d5