Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee0a8a7b24a8284…

MALICIOUS

PDF

87.5 KB Created: 2021-09-06 08:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ef13879fdd523cef5b6f0ab3eebb376d SHA-1: a3de76d6b77f0245de3e198863e226a14c286a5f SHA-256: cee0a8a7b24a828457da59c2dc41cb911adde33f7ddf3012343dd13926ab75a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, such as 'https://oniceh.ru/uplcv?utm_term=hydro+meteorological+hazards+philippines+pdf', are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://oniceh.ru/uplcv?utm_term=hydro+meteorological+hazards+philippines+pdf PDF link annotation
    • https://maintogelonline.info/contents/files/menijuzegapexaxi.pdfIn PDF document text
    • https://www.thic.net/plugin/ce1/ckfinder/userfiles/files/danenonigad.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/67416396802.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/13605676946.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/72737349847.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/defonunenodopaputi.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16085cbfca3ef4---38221146949.pdfIn PDF document text
    • http://pk.mo/userfiles/file/sajumimoginuzuge.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/11813903844.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160dc74f8b4801---lumiboxodijunow.pdfIn PDF document text
    • http://radfordhsclassof1970.com/clients/878146/File/wifijogabalanewidavov.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/65496437709.pdfIn PDF document text
    • http://ageofwonders.buka.ru/sadm_files/wamelijunaboxi.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/48779583190.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/somojuxojunawawiwus.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086872e9ef1c---kududepifozejasozetoze.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/munagimomeze.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/kitosafaxotifulinavuw.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/vmjee15okop08m375qsh3ap4n1/noviketezagiwepujug.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093bada1f73d---berijuvumux.pdfIn PDF document text
    • https://85097781.com/upload/files/xopebunuderodo.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/hf66olo9b75565lhh80sj8p0pf/vefagizim.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/88800643598.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_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10465 19208 bytes
SHA-256: 08cbd623b4c7688322e2484cf50d3668126b8a34b3b9ac2a39d8202324f32585
font_02_sfnt_off00013620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13620 11232 bytes
SHA-256: 4719700c8bf7f3796dc6511f168031e8e099c611a16dd888452d98cccac5c3f2

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