Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4abd9408d0342e…

MALICIOUS

PDF

76.8 KB Created: 2021-08-30 15:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d5e5ea268246cee72385d53590a82b43 SHA-1: 897a5a4b718d7b619466f89601c2d7f215380b14 SHA-256: 2d4abd9408d0342e018ead369405f5ba58bcac0ae5168d073d243b188082efc2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. Although no scripts were explicitly extracted, the presence of numerous embedded URLs, many pointing to potentially compromised or disposable hosting, suggests an attempt to redirect users to malicious content or phishing pages. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://littlefreddieking.com/clients/65037/File/37088085047.pdf In PDF document text
    • http://clubselectionvoyages.com/images/file/30712818495.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/44293387801.pdfIn PDF document text
    • https://majubesar.info/contents//files/jomidexudulax.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac378f30fb---66427374879.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160823df634921---xuratukowik.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/josamomadasi.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/baloluxusodosotusesu.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/fenugelit.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/8qe1d1rc0utmnvjbro13at3qf6/59007066330.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a6fbdf002---53806776750.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/pujulom.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/34279590342.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/70583871220.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e947bc2fdb8---15305471999.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa0fba4b3e---pofojivuzu.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/xadiwalelalidorawarufi.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/90080212122.pdfIn PDF document text
    • https://cubic.is/userfiles/file/nukujamonapobudulegapip.pdfIn PDF document text
    • http://ahchala.com/img/file/sejupezokunidir.pdfIn PDF document text
    • https://mmszke.hu/files/file/40835646204.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/jasexaloxenuzorafun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=eighth+judicial+district+court+case+searchPDF 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_off0000c4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AA 17788 bytes
SHA-256: b5c757f638303dfc31872bcbcb54789c3af4b86f1426b14a7a8b0169c62626b0
font_01_sfnt_off0000f2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B6 10756 bytes
SHA-256: b012f11b11db518894e1e711b48af9848f92de9fbe761d033b4eb2205ee73bde
font_02_sfnt_off00010b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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