Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5059e7b06f0d43…

MALICIOUS

PDF

98.7 KB Created: 2021-08-30 04:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bfdec30566cfc5b0c3211ebbe9c4eb2f SHA-1: d4398981c768547d8908c830ee534476d05fcf1c SHA-256: 7c5059e7b06f0d43974a7958daca44526455fb12e53d712a2ed0c35278a57734
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to lure users to malicious content. Heuristics suggest it's a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to exploiting users via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://irlanc.ru/uplcv?utm_term=clooney+and+amal PDF link annotation
    • http://duda-tech.pl/dudatech/upload/file/4002260469.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/rusulobenuguniroxukej.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607635c82e2a4---26520164436.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f065f67456a22dd435bfb149d6786bf1/41345294988.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/6rd0kftjj1an7kp8gi3pt983nk/gubexamipiwewijipilek.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/61550942406.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/jizuk.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/81508672564.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/j168trlcbvfcguf9hk8pbpk59p/fuxagi.pdfIn PDF document text
    • https://elperrocallejero.info/ckfinder/files/34432228176.pdfIn PDF document text
    • https://angkagenap.com/contents//files/relixojujazoxebitura.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c93c5d964b6---gogopatojulufoj.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160909ac9eedae---godegasepag.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/1sh80k82jv5ql55mg2m84u39l3/furakasuvurozawowogep.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/58686063784.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/19008641129.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/nanepekazomawopojubegepi.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/wubum.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/7112abf4223b0320b59d8f0265b7e2ad/98833524601.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/520561748.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/99363943280.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/42622986798.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/bexijosib.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/25153075212.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_off00011734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11734 20572 bytes
SHA-256: 0cdf37b9a20584eab4b6cc89e28181d0888f7d8be909396809cd9cad66525459
font_01_sfnt_off00014d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000165a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165A6 10096 bytes
SHA-256: d43f5d5f676411efa64655a732115d17a5855331f9ede2dab41b16c1d8fa585e

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