Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d2ca38de83989b…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 14:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 69da0c1e8d9a2e2200e3e6025307cbcb SHA-1: 94380c197c4f61e57880753f7ad146ee32dc20c4 SHA-256: 26d2ca38de83989bbc7b86ffe00dadc212e510db4f8c7582d29844f06cd9e433
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://accounting789.com/ThImg/file/39510105612.pdf In PDF document text
    • https://kaptenhoki.net/contents//files/gigotovepusi.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/b7b51aac57d689e7dd0aa267008a7c61/90044786593.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/31866793437.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1606f520ec9a70---15063155094.pdfIn PDF document text
    • http://feast.to/upd_file/zexowefuje.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/kivalozuxolosoxu.pdfIn PDF document text
    • http://zjgjqmr.com/v15/Upload/file/20218281018428959.pdfIn PDF document text
    • https://aedwea.com/upload/foto/zukeruburikelukubatesibip.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075eac470228---wanudejiv.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/90694924928.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/58897993440.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/jenibiput.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/5ef339e558d380711e52628d06d6c986/luvimadutufidotupo.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/98118295723.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/54a43a2c504c9bfcd3540af99674f370/lenunavebuz.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/rumotine.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021060307564973499.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/pejufaweroxiwan.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/76638373576.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/53230286779.pdfIn PDF document text
    • http://kesifveotesi.com/files/bexuzipokemubuzezov.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/gutijizopekipimivudedi.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16136f5b858733---jamubakaxav.pdfIn PDF document text
    • http://cba60.com/clients/6/6c/6c2dd71b6188bc8e8f5adc6209c6f86c/File/similadedet.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/pazupoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=sbc+curriculum+syllabus+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/66897761226.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_off0000dae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 18736 bytes
SHA-256: 5ef3c823035da521dc8c5396efc3ed0d3d62a9d8e2a089af3843530a9094de64
font_01_sfnt_off00010a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A71 10756 bytes
SHA-256: a5026a2d1974fbb9499c1dc12a408134a689c0962fe34cbb8ed1e93e5c46c0c0
font_02_sfnt_off000122ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1