Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7e02c22cb0b84d…

MALICIOUS

PDF

93.5 KB Created: 2021-07-18 14:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d4ac2621dc46bd1678b92b018c51dc2f SHA-1: dc87480a16d730a5ff68bb8c34b1a1d62a80707b SHA-256: 9e7e02c22cb0b84d603255ba6461d958203ed20b3b6860b8c0d0ae7e6494f285
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious or phishing content. The document body was unreadable, but the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://bhk-aindling.com/userfiles/files/fafobedupizatoz.pdf In PDF document text
    • http://auxerretv.com/content/public/file/37552050658.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/e3c0174c99f0e7d7978bf28ac0f6fdbc/lipatigebum.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/vawunod.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/036acf311cbf278f41e08d8ef835d58b/xoziduvukokut.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40bf2d9063---metekagenilenej.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/0e024e513612f1b39ba3163320aa68fc/dowazurazakoxagugaz.pdfIn PDF document text
    • https://datajournonepal.org/files/jibuzijewupapegelo.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5987883919---nupowesew.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16081d94b9682c---27296479292.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/43964173894.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/a6b67b4982aefd1fcc63f3cbbb90f60b/82877978337.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/gojipi.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/28473040860f3e8187fb33.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/95374487617.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/54318453936.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4741b851d---razixapakenebezuwurira.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/piketewipevebo.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/b00d404d1bf5a376359db755e1288104/jimiserarupomi.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16076a069892f7---10165394436.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6d31af59c---ponebu.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/97fca92b6912f7176f16610e6ca0a8e1/raxow.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a492fe0c0d2---bajobatoze.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607911e6a891b---67419311100.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/mikikitokugiti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=linear+regression+termsPDF 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_off00010a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A91 17652 bytes
SHA-256: 3a597d63989c3b518e9f03d38a4683d26f31cff9a07b9f8bdf5d6f2f684f390b
font_01_sfnt_off000138ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15116 10360 bytes
SHA-256: b98423d14fc6f26890d4de01d995468ea398df984745e447f437401f6347294d