Malicious PDF — malware analysis report

Static analysis result for SHA-256 3adf007a2c9b824b…

MALICIOUS

PDF

88.0 KB Created: 2021-07-13 13:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 9809438e59ce202eb0c5635d1176b8d1 SHA-1: e5587e1d5a6fdc425bc0875bf793bfe03fa2cb38 SHA-256: 3adf007a2c9b824b34d801be787feb23b318557fda92aaa9b14fd0aced15bb3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The file's structure and embedded links are consistent with a campaign to exploit users through compromised web infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://huntic.ru/uplcv?utm_term=do+intermittent+fasting PDF link annotation
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a377b2c02---zisigekorebibatejeli.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/68780885186.pdfIn PDF document text
    • http://fructusartis.com/i/File/17651487757.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5785a5625---jowevavufodemi.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/nt25kire3ganebs14r0rc9r6ue/32382340352.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b73e50da30---60523734013.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021070200582073499.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/60271456607.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/9d1685b5eb75337efdade7ef35c5be71/50259847642.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb1e25a3ef---19035530291.pdfIn PDF document text
    • https://le27.fr/docs/file/98627894993.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/1bfbecd7f26265ec64cd939e8ada4a51/besetodo.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d845ec3c0---toredopusiw.pdfIn PDF document text
    • http://domplus.su/userfiles/files/12314721358.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/bda15a9ec4d7efcf7952f49652da1919/zajupuxaxo.pdfIn PDF document text
    • http://genbreedpublisher.com/files/upfiles/file/xesumevanivanibov.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d4425a686---93084553041.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/71605769538.pdfIn PDF document text
    • http://allycatering.com/userfiles/viwememaxedikesitutelave.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/bedun.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/f10aa889e220d6eec837e7b63cc8e89d/93701720991.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/9adbae5941561a90baa3e8dacbc758d9/39901142149.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/ih6tsdp175ttcgrs7vrvk2hif4/97328378073.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/23779053008.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/vvn0rhhji6f5gckh2n4nr5uhg4/wekokukerujopozix.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e9515137f---nujuxuwixusovo.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7928c4851---nekukit.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/b337e1cd4ae42000f150879a8f0f2bc0/naxerivuvidosirifaxu.pdfIn 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://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_off0000f58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58F 17436 bytes
SHA-256: e0448db68202f4d1ae05cba7ad60cd19bece9b84ff9c789a773369e4305a108e
font_01_sfnt_off000122be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BE 10512 bytes
SHA-256: db1c9230247a7fe9381e8efd762e6e537bbd12954b1a794d2e0c73556b5546c8
font_02_sfnt_off00013aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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