Malicious PDF — malware analysis report

Static analysis result for SHA-256 039a94a04325203a…

MALICIOUS

PDF

103.3 KB Created: 2021-09-01 07:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 569d036c7159788841824e11d71adb5f SHA-1: b2ae4e4eef8ead3330a23c76773b7ec5e5d6ae8c SHA-256: 039a94a04325203a1be8b25cf59d2090f93f9b65627e987b7c7eae66e83f0567
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://crysiq.ru/uplcv?utm_term=mtg+war+of+the+spark+release+date PDF link annotation
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/f43b9855df88aab9f43c67a8d401210a/21775170825.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4d32e2efa---40070675509.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210630_222555.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/91331199131.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f7bcb5592---fuxenesagupezox.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/37917072413.pdfIn PDF document text
    • http://reichspfarrer.sk/file/91250086093.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/57150310648.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160ae892879495---diribatizulurelefemafe.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/11537228848.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f0692e1fa---19509508180.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/80529984298.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/92172277e39ea0a4ba85a78ed16eb007/2931382123.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/72310723209.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e650310be8---38223414164.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/63qtuqqchnq3eabt64ols2ci6u/78384742857.pdfIn PDF document text
    • http://kccmaul.com/files/files/69549416421.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210720045135_814037000.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161066ee6dcc6d---nozokug.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd2cf15abce---sasavesixexame.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/wibagavubiwefur.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/vonoxexuzomuvejirixezul.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/22372882678.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/2vigf28aa2q57lmt8qm491juj3/11571444106.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_off00012cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB2 18668 bytes
SHA-256: 0c9ad7343f0b50a83f675a3fb443758726b976c993ed1f3425c142a84b63c471
font_01_sfnt_off00015db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DB4 10752 bytes
SHA-256: b9e62e5f4ea7af4864ee1f8119cb9ab08037dac219dd960f9627428c4967d3e4
font_02_sfnt_off00017677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17677 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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