Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea204ac14c65e29…

MALICIOUS

PDF

105.6 KB Created: 2021-07-04 21:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 62963d5424773107d292460042a9bb37 SHA-1: e0d29c12cede890ac1730cbe00b5b313407ce7b2 SHA-256: 0ea204ac14c65e2930fe2a9feb7157a8411f1abbb0b3335bfbdad1c215bef438
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://study-go.info/wp-content/plugins/super-forms/uploads/php/files/32abed6d060af8d6301685db7da4a84f/fojojisudaxagiropureladu.pdf In PDF document text
    • https://klairtransport.com/uploads/files/7290076611.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/sibogesosumirirufu.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e154f3568---93866743197.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087527f79fda---55260684366.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/xikolix.pdfIn PDF document text
    • http://bjjiffy.com/upload/94285473509.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/a2rpnogvudickn0bjq6gh4aff1/kaxixisowowugu.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160daac396c1e4---wiletozavaxizade.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/29503940371.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/fshtteml9hgt1p8nubflb4aj7t/sinovunoxi.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c44a3cf03---juboraze.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/v676ifhot6vhfu82mc20nn75u4/lifekagelere.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1bd08952a5---sulug.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/watagovinivugerufikiru.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/21994239e55a210cca957b50c7b16124/xolivozexixawanixapad.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/lmh5t5dpmgqvi7sv6rfhp9tr9i/9159900055.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db1f6e5b365---78189786290.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7aa443077---nofanume.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210628165920.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/43065834059.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/fawukiwiwojagulonawo.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/pimodapafixuxetipegit.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ca6bdb9c2---64887672108.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/37685191334.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0ca85e156---57305818551.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=difference+between+job+order+and+process+costingPDF link annotation
    • http://medlab.webd.pl/upload/file/segejitejigoriva.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_off00013a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3A 11104 bytes
SHA-256: 7b99858eb26452283ab078d79c54681c9b984b5e0b701fbcd2f8fcbc43229606
font_01_sfnt_off000153e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BFA 17152 bytes
SHA-256: a664f0d0d41433ad8b3531ae690ca2a78cdebd3204392136a49fbaffe42569ed