Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2297b97200b2900…

MALICIOUS

PDF

82.3 KB Created: 2021-09-05 17:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4be0f720dcbdab3c1275cd2c90c13bff SHA-1: cb96199888ff7d8c046e722689da5736b13d30e0 SHA-256: c2297b97200b29004c10d01d9b90078173b1f074f9e329025d54bd2eceae0ca4
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to potentially compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute further malicious content. The presence of a 'download button' lure and instructions for password-protected archives indicates a common tactic to trick users into downloading and decrypting malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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 http://thesecurityguardunion.ca/userfiles/files/lilanazitodirewi.pdf In PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/pawitu.pdfIn PDF document text
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/gezodapuvefumovisifujudin.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c6d0240180---30504974698.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/genolevanavajijab.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/7acfcbb0452b0d0a59b55f7759dfe7ba/65453960373.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/85028457370.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f2ba3951c---kufosixekemodatef.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/sutodawumuxuvelakujur.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/nomoburaguvakexuvas.pdfIn PDF document text
    • http://mamam.by/upload/File/file/94368575849.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/22120357563.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/fetuganorakomaku.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/15881801165.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/39819505986.pdfIn PDF document text
    • http://pincesorvarshop.hu/editor_up/gerifexovepabelegu.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/nafir.pdfIn PDF document text
    • http://sdds.be/userfiles/file/mazuzosumuke.pdfIn PDF document text
    • http://rancholasmonturaspremios.com/campannas/file/jiwilofa.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/daraxenuvikokosir.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/xibumiwajeku.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160abf4b046a13---govepide.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17138852044.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/28168485407.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/9242921797.pdfIn PDF document text
    • http://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/31237688924.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=remove+password+from+pdf+adobe+acrobat+readerPDF 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_off0000db7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7E 18160 bytes
SHA-256: 79c8c762e7d26a6ecc6bc6179655f4d95db35bd03d56c61938092ce6abb6966e
font_01_sfnt_off000109f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12210 10876 bytes
SHA-256: c4da2eda3eed283147cf1ef67febe3b4ddfae28714c9e9f14a22f1ff84e6cc12

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