Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a10ed52d96f4bc…

MALICIOUS

PDF

78.3 KB Created: 2021-09-07 20:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3a396d9bbc2233cd6492246138ab5d3e SHA-1: fac44cff2e7b4be7a88b553312177ab1da326376 SHA-256: d0a10ed52d96f4bc6fbb80720a1b374770c1d7e112ac2791d05876cdbb24cfbf
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The embedded URLs suggest an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/s1q79vtai628gn071gcjkldcu1/favuwebesewejo.pdf In PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/2aaddc9028d27efb3da1ffc15b818a8f/jusizujedopiwipelejul.pdfIn PDF document text
    • http://df-foundry.net/d/files/bomijalugulusoravetasupa.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8ff2d7392---gapetunegilapok.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/50544938105.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-7-5/20210705040340160697.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/o5s3a90lg3ps3m29l71tdi9voq/40548278554.pdfIn PDF document text
    • https://thieumaunao.vn/workspace/develop/uploads/ck_upload/files/43297495334.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160738c76e3053---litamuwojafedideg.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c10aef7b19c9fdabf5f4f9991f8a2300/73278846946.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/05d5fd7c4b674f7ec1e43d549e2bc9f8/tibefobatibemij.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c42e3d668fa---xafulogafotajeburefaxapag.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/b6731684ae233309184395e0b2c25251/gozami.pdfIn PDF document text
    • https://spiuruguay.com/ckfinder/userfiles/files/pimojuxavefubitepaludi.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/1a9af536a3ee02568331d17508c481f3/96914337814.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210902/file/16305514883970.pdfIn PDF document text
    • http://askaudit.ru/price/98886687578.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/dexosilibeboxumaradene.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160df71c86f079---pujekupobef.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/28244689263.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/9a95opr9n9gj36o3g3qtsmc9a6/pidaxivotipe.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/64374214190.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/xavokox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=chord+progressions+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A8 10504 bytes
SHA-256: 103f59e617a34965fd9a0d0985d8d1796e0b30747d2662e9c87f1c4b4c9f9afb
font_01_sfnt_off0000d135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD135 17524 bytes
SHA-256: f1930c7dbfb06a14ebf417a76cdcf0ee0c229b52dddc7067345edf3786b6c825
font_02_sfnt_off0000ec11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00010423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10423 15576 bytes
SHA-256: 1a205282cad7479d85818a6069b6b970d8491d19c5d32bba8f9ba85393011c47

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