Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d09b95434eb9a7e…

MALICIOUS

PDF

81.9 KB Created: 2021-09-10 05:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 164bb70a5d53bee32de4c1bed9acf590 SHA-1: e900461907eb9ad66da9a22ff526db37b141c2e1 SHA-256: 0d09b95434eb9a7e777f0443f91398b02f9756265d0e3d8b53b9ef3dd515b26f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms hosted on potentially compromised or disposable domains, indicating a phishing or malware distribution attempt. The presence of a visual download button and a QR code lure further supports this, suggesting the document's purpose is to trick users into navigating to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=how+to+install+amazon+app+on+android+phone PDF link annotation
    • https://f2h63c2.ip4secure.net/upload/files/98831913310.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/jevvetp7r9ibvq2ahjluessl21/14015794021.pdfIn PDF document text
    • https://pesonabali.dswip.com/ci/userfiles/files/doxipibowebejarudokatiji.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131fdf760679---xitunizivojunijusuj.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/lomozuv.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/46233552340.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/57720733334.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/dudevupobazufokexojudu.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/naledinovulabititidano.pdfIn PDF document text
    • https://emartdeko.pl/galeria/file/66534762346.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/luxifovigedezikomexesa.pdfIn PDF document text
    • http://goodlack.cz/userfiles/file/soxagenalozu.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/natofowakumufilasirufumam.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/bosubuvitutakosuzarudum.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/luvumanutenale.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613518abd23b7---43685233096.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/xogigogotuluxuditeg.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/80401303866.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/fb4mkol7orcq74n1btqju9er54/56308002561.pdfIn PDF document text
    • http://aromata.ru/upload/files/11447865810.pdfIn PDF document text
    • http://garderoba.sk/images/_file/49510508803.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/2024686190.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fedef2cbb8---89747972047.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_off0000d8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D7 18740 bytes
SHA-256: 3704bdd005ad106be52ec8d0b8c502b18bf22b2d3a820d4fb9823402e889d7b1
font_01_sfnt_off0001096e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 10796 bytes
SHA-256: 2b4af4731c184d1556b8dd134aafea187f629f433a742505b25fc0878742c87c
font_02_sfnt_off0001221f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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