Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cab9aef2b140ac7…

MALICIOUS

PDF

95.3 KB Created: 2021-06-24 17:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c223b1eb3e744cb3dc0320c67b7ae24c SHA-1: 811d0c60f27c550f6967bdc3d7c1bae2cae3506c SHA-256: 2cab9aef2b140ac7c75583ac2f3f76b0231c8130b11338e96db2585ba7cc15d3
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://inwebjor.ru/uplcv?utm_term=boomerang+movie+isaimini PDF link annotation
    • https://giriconsultancy.com/content_files/files/monusomewawa.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/pq3tkch5l8c48c0e4c5gleesk0/74412941379.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae1396e676---54568174185.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/b9bc7fb885621b7994f9a9dfd1b685af/30570336385.pdfIn PDF document text
    • https://watertorens.nluserfiles/file/6081661182.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecd05c58bd---refapox.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/lavidijuxinabukapul.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/fee6262b71f33f4aba0def9e7abc9b6a/89783121832.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/gomiw.pdfIn PDF document text
    • http://renovator.cz/files/file/mikurub.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/79632711529.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ce97a66e431---61360410319.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac917e0c52d---zezitatumajetakojanaz.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6fff7c99a---36684930917.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/42345985242.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/2f2b644e9c1a8da4ac6956390d1eac8b/7976173802.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/kakupubirosep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001027d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027D 5084 bytes
SHA-256: 0c792dbd9fbd5c08bdcd06b8ef695439b9b319614a6e76c375a92247635ac97a
font_01_sfnt_off000113b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B6 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00011f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F19 11112 bytes
SHA-256: cd91e907415e3547b9b4173ec170cc50e18a896863a3040ae3672550df050c35
font_03_sfnt_off000144ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144AD 14528 bytes
SHA-256: 1cf10cf9e9ee914259b9169f05d1534a220d5f9ddb28d9a6b5a6406e46ba5148

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