Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d49c19903f5cb5…

MALICIOUS

PDF

79.1 KB Created: 2021-08-14 22:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0a9613d0bb3f57510bc6f4ccdedb57d6 SHA-1: 2437432e508e762bc0e0ef5ca5c60c7678a954e1 SHA-256: 62d49c19903f5cb54e662982827165b6cf4688e97d7396116a0218b89906f509
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is indicative of a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/9ac4856a8668df6203fc45ae1b917f10/12586315447.pdf In PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210728_A71CAA15878A7F69.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084417b4784a---losupideja.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16086bd7e01891---83707289546.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/7937507630.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/30325183879.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///jujutetexumejedekagodezo.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/xuzepufimelujalasired.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/ge770sn54mkg553n60vqvvhf02/pexototabar.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/c0bd1d92e07f44a48b1e031dc809a464/63619004873.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210811_6E6092A458258E95.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/pozizewaxugi.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb4ae482ed---rajogilarevogikogaruz.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/a0de5d5e1c4ea00c0e5ab684edfaa534/49502504121.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/04gm67ijos69npetpfbk018hu6/53468889861.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/87193083198.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/98185927163.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/0d18fc0a6de2a7c526ad921d20973471/24834408091.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161085dae23bce---semadonarubetokezadil.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/25977194361.pdfIn PDF document text
    • https://clinic4lab.com/upload/ckfinder_temp/files/20210630100815.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/2b0b340f67c1751009ef3a414f9b9f6a/vapifinopufadapuvup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+use+the+scanner+on+my+canon+pixma+printerPDF 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_off0000d236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD236 16196 bytes
SHA-256: 6cb689c04230d7e9391451ec9fcfb9838cfe710173ddad818e41cfb1e313e1ec
font_01_sfnt_off0000fc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11464 10984 bytes
SHA-256: e6f324c3ff2a6006766877b1b7fa1a6593478ee1eb360c04c7a5707cc032e8ee

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