Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d0ef26d1e4bb62…

MALICIOUS

PDF

74.7 KB Created: 2021-09-06 06:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4ef7f028169bcb5e59cfac120213f7e7 SHA-1: 435622f4b364dd7d012376b3480dc4812806a509 SHA-256: 01d0ef26d1e4bb6283955eb9aeb2d9ea4fcbe45366f692ddf8196d0ea0cc9883
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to domains identified as disposable hosting or compromised CMS uploads, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The primary attack pattern involves luring users through a malicious attachment to these redirecting URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://saharun.org/uploads/ckfinder/userfiles/files/23529936566.pdf In PDF document text
    • http://teplospectr.ru/images/files/67259851571.pdfIn PDF document text
    • http://dvarenda.ru/upload/file/18490523493.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/93038801370.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/debipisu.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/buleme.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609bad85a6554---nuwojeletagamigelujugu.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/f07411950a562913c6f3a079b2ea4462/57596302548.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd3ece85cba---jaxefuvibarusadusazod.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/wodujiviz.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/zuzamulafaxuxiwelilelovin.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6bf0918b8---dadimukojojitikonulep.pdfIn PDF document text
    • https://btegypt.com/file/fizojukanuzisozigolivu.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/duvarobirogi.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/sunamutinil.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3d6428341---99758222359.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/2427229d422e2c33bc7fb2762c0e6550/negirutukululeporix.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/bikivijurerivuba.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/xaramatike.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/mesikusiwa.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/7428a7c7126671c9d852cb33f7e1d0b6/57780010893.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985926c3d4d---2247054906.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/20716289464.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/83013254772.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/lojes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=homedics+ultrasonic+aroma+diffuser+manualPDF 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_off0000c2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADB 16260 bytes
SHA-256: c1ff292a2e740029fa5b15eb25875a3d1157d4469712e5310544a603b2b53cee
font_02_sfnt_off0001045a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 10728 bytes
SHA-256: e10099a2511125d128c794f9e7b65b7f424b46f0cc06671403bdf73ff6c13714

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