Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab034babbd8bc48d…

MALICIOUS

PDF

88.3 KB Created: 2021-08-11 01:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 00fdc234e33b657073e6cbbf20ffa5f6 SHA-1: f534bb429b8ebc58bd4545891a13daa541e3890e SHA-256: ab034babbd8bc48dd764e0427c444b66ed473fa2bcb218461a5e03557c2d44d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the nature of the links and the PDF structure point towards an attempt to trick users into downloading further malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://evohome.pl/userfiles/file/juxezilonemidafujakaku.pdf In PDF document text
    • https://arch.ua/ckfinder/userfiles/files/bafivujakefoturifetenep.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/93374102984.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077479418093---78185619546.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/t2ljog10gmt918kh8lqtnm9qa7/56973822548.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///bukikoxesasunamodaju.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5378ef72b---49449971204.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ecfa01d891691b0b5d9de2815724f400/52092331514.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/66867092387.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210618_045227.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/fotoguzubazu.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6b7442eb1---wasujaritazekexoberudo.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/r88o44kv1cu77f1odg1b3rcisi/51153100152.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/gusetodetuxiwirifu.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094cfb2ee7cb---dovejeveligobado.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/13275605646.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/lasakofawofim.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/34dclpm3ul24iqpbo5gthdneib/35445484070.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/saxafuzewiba.pdfIn PDF document text
    • http://nakatka.com/files/file/dulagewukexuxo.pdfIn PDF document text
    • http://1careglobal.com/upload/files/dubuxadikenejemipije.pdfIn PDF document text
    • http://skia22.ru/pic/file/37595178465.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9227b9dff9---vezaxisopixarave.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/10133166602.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/xisevufaximirujigusetav.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/lisuvigazumawagirunegil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=the+last+airbender+2+full+movie+in+tamil+download+in+isaidubPDF 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_off0000f51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51C 16712 bytes
SHA-256: 45ad0c7ff8e34ead80d0d01b368ceed3634771c8f4b75669244f10fe72d61fe2
font_01_sfnt_off000120ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C3 11092 bytes
SHA-256: 7ad1a9e1e7bc726d76f8b4e7350d874e766d48292799bc13a57aaddc7a75dc78

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