Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7a52e4d00b31bd…

MALICIOUS

PDF

106.7 KB Created: 2021-08-07 22:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3f2a6a867621116bc2db8c85c6ff23c8 SHA-1: d64f5d975ba5a1bfd688b18e23ad3f644bb97434 SHA-256: db7a52e4d00b31bd281ebc69b11ddac1e03cfeae8e18accacd96eb98b727eccd
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs hosted on compromised CMS platforms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/ta4cproifp793ftcjumt1e109g/jopekeri.pdf In PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/ceb96f7dbd11304d55c5e1952c1aa157/39512337314.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/69383501915.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/58682395916.pdfIn PDF document text
    • http://zuche0551.com/upload/file/13758949051.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/c1aa7d758ecf5275f6458c7c6a6756d9/79423870061.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/ua0mvrad9n8t8kbp4oosakcnl7/83782139235.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4584e5004---talida.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/36150079519.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/71718345305.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca2917d3352---mibomupifaz.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9737a7119---53999571177.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/b0tfnqaq22ubot6v7f9hd578j3/makibiduvifawazup.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/61222690602.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/madabuno.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/53470117612.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f79e23550c---17431757253.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/41144707570.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33108970552.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/41682335142.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609846648c0a7---47558635615.pdfIn PDF document text
    • http://sxcec.org/userfiles/file/20236531229.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcd470ced6---zosediruxu.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160846fd26a771---vexow.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/kavop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=mame+0.139+rom+setPDF 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_off00013c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C64 10600 bytes
SHA-256: 01037f3d54f58616d7ee11528689d8898bb181f71c925482fae224ef2e80e6da
font_01_sfnt_off000154b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CC8 17944 bytes
SHA-256: 0d6c37438b79133f3fc893d8fef88814756e7795de07645ed7071a9aba45b82d

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