Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5be5bb5914b27f…

MALICIOUS

PDF

148.6 KB Created: 2021-08-06 05:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 9f88a9b5e83fa0470bc6885af520be8b SHA-1: b9c7aff2340dd23597b2ae563169b8853875a3aa SHA-256: 7d5be5bb5914b27f29c5554c633d368e2928dcb3e2dce16c0ed27c5012b587c6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of UTM parameters in some URLs suggests an attempt to track user engagement with the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8792

Heuristics 5

  • 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
  • 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://patroha.hu/file/80280701858.pdf In PDF document text
    • http://giaodantanthaison.com/Images_upload/files/539500253.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210709_7BE89E5264E4D975.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3795aa568b---zovej.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a9aca9236b1181a16a2fa0ad54c1756f/mudurasipodelev.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d582ec6506---muviwizidiwevorizag.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/bofosajodiwuripigomidutib.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/ponopuporaka.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/7461503cc508a25a82b0269a1eaee9e0/49991430554.pdfIn PDF document text
    • http://leguido.net/files/wudaxorulanijosivikur.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fa11e1644---21503697489.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8023be9fd6---44819117764.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/a139e66c56091444f65fd585abec235d/88945738539.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/53289083173.pdfIn PDF document text
    • http://bereanbaptistashton.com/clients/1/1c/1ca8668e480cca1e897b6add33210fc6/File/82322367690.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/12607184610.pdfIn PDF document text
    • http://w-mill.jp/images/file/76930073994.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/wilotu.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/mamokirabo.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989bb223fc9.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d26560a2c59---40435167656.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/kativ.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/fipazixebunolujekigenu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=repaso+del+capitulo+4a-8+crossword+answersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002134a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2134A 20084 bytes
SHA-256: 96199d0b609ac31df4fca62e4d9daa9d40cce4858fbdf4ce3e5d94c8d73968aa

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