Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e29d4bb4e39146…

MALICIOUS

PDF

83.5 KB Created: 2021-07-03 12:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 84be665880367213822385adafe693ca SHA-1: 9e583aa5132a2d953ead611db8c60d6a64e47676 SHA-256: d7e29d4bb4e39146fc53499fd52b3f2dcb0f95938d17519d060eeaf6a7b129b6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised websites or domains used for hosting malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure as a link farm suggests an attempt to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://floridainvestment.cz/files/file/nidukijeloxepebigikop.pdf In PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/4566283f908abd9fb9236414497b4176/18777387001.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/wazudopedixezedoj.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/pfj61vimnkb1m5n6idnlcifu1e/19826912908.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/3cb0602505f6a11a8965dda7c3eec2e2/98917501759.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/pevalese.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9a7b37f1b865dece6327dbb2e8fe740e/labanika.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/63584655473.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/t92ujlhdbauhpor38r1961fql3/79114628145.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/40507140247.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/ropupusobumu.pdfIn PDF document text
    • http://riversedgefm.com/files/file/27940784954.pdfIn PDF document text
    • http://propellerclubsandiego.org/uploads/files/92496994799.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864c981b395---36704834387.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/b1taboust6k6kaoe2biqfgj5ff/20134236463.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081aa6c1817f---zabijugupakonorigu.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d224fa245b---82420262923.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/bc2f6ede930e75a66480730f76b6ee22/37982744442.pdfIn PDF document text
    • http://atomleasing.ru/media/File/37563754048.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/dbcrbntst4ka7srs7m86u5pt00/sekaxaviberigojoge.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e76ff93d11---91058876280.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097fb501a4d6---26714904258.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/667198d43ccb35e666533813fc0d832d/mijavutasob.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c523ffecf78---87175931883.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=soap+and+hot+water+clogged+toiletPDF 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_off0000e2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 10784 bytes
SHA-256: 0e7867d7bd8adecc5ebaa1333b263bc77d7becf7ca997d18d14431d10cb1fe6b
font_02_sfnt_off000113a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A6 17156 bytes
SHA-256: 0eb7438610f1e07dabfb493a3d7f3302a470e4a4d5a246a7d58d8e56fbc36a7a

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