Malicious PDF — malware analysis report

Static analysis result for SHA-256 32667f2d6e829fad…

MALICIOUS

PDF

86.6 KB Created: 2021-07-02 09:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7c7e4a2ce02ce12338a543199baa318f SHA-1: a779c82f4ce6c3959dee05a38765057c4e499805 SHA-256: 32667f2d6e829fadaa5632fcf2f0a190d19a0e4282cc1905a2e45312e1f33dae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The embedded links are the primary indicators of compromise, suggesting the document's purpose is to lure users to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=determiners+mcq+class+9 PDF link annotation
    • http://ranaghatpchsschool.org/userfiles/file/89604024480.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/411fd44eb8158a35afdd9cbe4c0727d5/fipigegolarigokode.pdfIn PDF document text
    • http://asustainable.com/global/file/mujijiligokonogog.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/kirejobutezapadenodi.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/togj509en8bor1qhiu0r3laand/gusimituzebobuvid.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072e1133b788---9007429260.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160db75a75bfcc---kodanenolamupoje.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/37643817705.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/c18aa668d09cee9934bf2270ce331491/kagoju.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/513625758.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/ca5hvob5qrm3onovmri119gjs0/larodulu.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/73687783529.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f11f071d4---xurujoluzuvokofalilunum.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/64757782543.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/dijikamirun.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/85104147819.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/a1740dd16e84e894cbe4ff5592a7cf70/sopob.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/27bcb1bab11134360a72d6b6e9a871e6/89290849688.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b333ed1042---65789487406.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a53c0f7cc73---bawidukolufepalax.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/fenoziwulaza.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e0ac831a9---biwituvo.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_off0000f186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF186 10584 bytes
SHA-256: ccb3d5d87f13dfb331dd6a77bae2a9afe945c9b1fe689b1c79b6bce07eb4429a
font_01_sfnt_off000109b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C5 16756 bytes
SHA-256: 8509a781acccf306ae8571ecfacf8ab4bbb4dd78f8e2edb58e9fa83aabb19efb

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