Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2bd7d226baf28c…

MALICIOUS

PDF

140.5 KB Created: 2021-09-03 07:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9d0832ea1a6abf08676cacc1d033fe7d SHA-1: 3c26c5bf62d4e44ceb1ced272af4cacf686e54f1 SHA-256: fe2bd7d226baf28c630d94747bad917544e47d3215cc152327902aa5683f8f88
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or are hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and contains no readable text, suggesting its primary purpose is to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://tutorsbureau.net/userfiles/file/vujazabosipi.pdf In PDF document text
    • http://canvangdientu.com/images/file/36445001243.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/weradinuvivuzoluji.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/gev35kse6h51onsf8ace9j21tj/52267165957.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/lovalupumumojokat.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128950e23481---5550577468.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/15089178074.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/14095164294.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/pumozuvevejikifewinerem.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf53e95ab4---52391103987.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/34751053319.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/mimonepe.pdfIn PDF document text
    • https://badoza.net/userfiles/file/migem.pdfIn PDF document text
    • http://broadmoor80.com/clients/866172/File/fametogojowozitixogitidef.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6b0d8fc85---woruxabixe.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/fe70b32e4978afd7688fee6e15238ce5/51565898812.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e1e91d14dcc---rubakazito.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/putit.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119260ad0563---92111934409.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b06bb0daa49---20278473231.pdfIn PDF document text
    • http://ypdtools.com/ckfinder/images_store/files/74587136140.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/bd2198ff964b107689e29abd5bc14a56/tuxewofelosobefugetega.pdfIn PDF document text
    • https://666666.vn/upload/fck/file/joridovadugukixabijapig.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e054d2a694e2406e31fe361378f93681/34415317942.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=bpsc+assistant+syllabus+2018+pdfPDF 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_off0001c11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C11E 19076 bytes
SHA-256: 9bb2773323213fcc92300be2dc078c220a3049f7a3afc667bbc6c738a5cf6ad5
font_01_sfnt_off0001f224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F224 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00020a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A3B 11172 bytes
SHA-256: bbb3f9a750b3b141476d1473ddba281e6e3e605edb846b61bfe497c190323a60

Open this report in the interactive analyzer, or submit your own file for analysis.