Malicious PDF — malware analysis report

Static analysis result for SHA-256 26954efed3ed757f…

MALICIOUS

PDF

83.7 KB Created: 2021-08-18 00:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 974f36bc72be387ca30fae1dc93996b8 SHA-1: 8a825c4c1ac395fa45dc834cbef8f2a9af027f90 SHA-256: 26954efed3ed757fc624a197a1df6ca2d04af89022259d82ba1fb5215eec33b8
156 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to redirect users. The PDF's structure and the presence of these links suggest it is used as a lure, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://centralgiving.com/media/userfiles/file/zolazudemevo.pdf In PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f448bad01c4---wigilazawag.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/govekokis.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/14023687102.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160743578f2b76---99471388101.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/zofamaxexozubazuxizeb.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/ketalagelemogoguladipot.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f762720bb8---lepapupe.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/69435038779.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/15d0cb80689e0e1f8e4f884b770f6649/liboxokesurosusigeruxo.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/vinitizofuzo.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/fapoki.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/80917276674.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608108a27bf70---fajozefobazat.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/91877972861.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098295e5d17a---zirose.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/20256071103.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/limabusakupilekiwonaxidog.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/63324329615.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715ddedb506---mireluko.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/bo9rp1gsbbpbe00tqdjf32ljj0/dematefifemutidisuvoxi.pdfIn PDF document text
    • https://cargobull.cz/res/file/57627531130.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce985a957a---waroxobujaxanojutaz.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/favanawumiwokaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=dibujos+de+tangram+para+preescolarPDF 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_off0000e120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE120 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF932 17636 bytes
SHA-256: 0272c00de523b4c76b14be72f89810a7acc22a98cc08a0e703ec241427c6cb93
font_02_sfnt_off000125c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C7 11228 bytes
SHA-256: b5d03e3499f201ae31b8ea7b132e63242aa044e15eacc36e0cf48fc56c0154b3

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