Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeedf345b6416a4a…

MALICIOUS

PDF

86.7 KB Created: 2021-06-13 05:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0c6f2909a8e77647fe9f49aa000468f2 SHA-1: 304212866a6f4fad9b37f1eccff9f38ab4a44a08 SHA-256: aeedf345b6416a4a9ffbf1a127ce598bfa7952e86d31586444eda339badaa012
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, with ClamAV identifying it as a 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains references to 'Bhima sambalpuri video' and authoring application details, likely serving as a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=bhima+sambalpuri+video PDF link annotation
    • http://aweibel.com/Photo/file/59628659352.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/cb57370e8ce6185f04c0e8715abc0dca/xasubaronip.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/82211651762.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/66294856147.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/sr1uu6u99s368qls3tmmf48dcv/vakatagokefumoxev.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607be9db71e83---30082774180.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/d904ad73a7b2f6244dcd42ab940a0887/tovanemi.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd264e1d37---bibijuzifikebovugevezebe.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/esnl0k9i991s6fqa48l5dj6117/lekalisawogasubewutivo.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e45e0f932a6bfd49958a9b3cd0cc56b8/lujuwakiwivizuralefeg.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/ace9835cb8972bed8479ad2eef3373cf/wafujotipirelukadi.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/19785173125.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/babufeviji.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a8205bde6---jutoxigagiligejapov.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/widebubixefuluvo.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/b01a4a37f9d644136728651086520bb3/zawedabi.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609d70f455058---revajigakejeratupugun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off00010120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10120 5448 bytes
SHA-256: 67c23197a4cdd2a00b14016145f1830d99dcc55047d5fe33f0c5e8ecefb5a2f2
font_01_sfnt_off00011376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11376 10308 bytes
SHA-256: fa9f05192053fdce5aa534295d723c85fd7b051e172f50a8c748f64556fa6942
font_02_sfnt_off00013677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13677 16632 bytes
SHA-256: 7ed423fd6f64a2accaab24a388a557cab9318e50e2ef4475c53ca1e35efe0f17

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