Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ebe934b97a1907…

MALICIOUS

PDF

90.6 KB Created: 2021-06-30 03:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 569b9998e37eb5ebf77888e78266154c SHA-1: e28fbccf377f0d5d7a60164660a44109faba88a1 SHA-256: 12ebe934b97a19074bd5fef6d7bb404292227040f9d6e13fffffa4bf2fb5a409
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links pointing to various websites, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be acting as a link farm, likely to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/smgjpmrg8fsdde420l1n3l5npg/wizarisuwovonevedu.pdf In PDF document text
    • http://asfalon.com/__files/file/logut.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/24612a5c2bf3e1e5189b9a76f5707ecf/wefiguvokigaperipib.pdfIn PDF document text
    • https://triosms.com/userfiles/file/lepakutipevopalikisameba.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/rupikofo.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16092d5672022d---82089556935.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d068a6c515a---pusizupopudibedesa.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/bqhabvslc5lf0e40kjtaj81ne3/53058549640.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/tufewexomat.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/tirapurusul.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8689224a3---besinilomikos.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/ditela.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ebc3923fc---77860283491.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/26071105656.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d832380df---fubokaraziruji.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/70875479125.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/0f615f6d38724bfafcc4c427dffdccf6/bepuxesenorux.pdfIn PDF document text
    • https://smallislandcurry.com/wp-content/plugins/super-forms/uploads/php/files/19bad677bba4a0e76531a337b9f1243d/sokunilerexijaxifed.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/lefimozisiwobus.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bec7f47c8f---3919030907.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c00a37b00bd---tafafejuxebimomanakelula.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=state+three+rules+for+writing+the+chemical+formulaPDF 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_off0000fd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD94 17320 bytes
SHA-256: 57b1d331ccb3cb8c47eb505b3c0ecf117cae15a1d06810f50d271a741327f6f4
font_01_sfnt_off00012b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001434c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1434C 11044 bytes
SHA-256: 43431c08c64726f01ec291432c8d5ec74050d37333b8ded5eeebc66ed90a67c1

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