Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c632015946f609…

MALICIOUS

PDF

80.4 KB Created: 2021-09-01 07:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8795958ff73a1de10dac953f75ca6624 SHA-1: 356f17882f186b2ecd1b609177eda502ed841243 SHA-256: 29c632015946f6096a32c588392dcb963009a9b7a172c0e7db814dd33ebb30b7
154 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple external links suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8512

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://4998horo.gmmwireless.com/contents/files/1690756584.pdf In PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075db4a33bb2---60658779292.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765fd4978c4---78315586320.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9997eb125---tisiponi.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/17131804029.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/20709710836.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/89231362842.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/nefifojiwemapatexupawe.pdfIn PDF document text
    • http://abroadster.com/files/fowat.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/99388722748.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/19894673088.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents//files/sexirubofuporipofuteg.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/gibubapivebox.pdfIn PDF document text
    • http://reunionfamily.com/clients/6/6c/6c58f7de0247188f02debbcda007d80b/File/novukejajosamuvipadolokib.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/24973549292.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f12360bd12d---zemofijaro.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/b53aeeffe5431d40502e733db5ec91e0/jibid.pdfIn PDF document text
    • http://71mhsreunion.com/clients/f/fd/fd19d29f3ef40f7e1d0269d1df38e7d4/File/desojud.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/882d1bb497960725635a56205be8e9ab/55735461086.pdfIn PDF document text
    • http://abnicum.ru/files/file/23998354009.pdfIn PDF document text
    • https://gppacdatabase.net/userfiles/file/50844347700.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/7mo083k2jombsaqvt6gj9jn8i5/58652766256.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/63901684095.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/79600694235.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=bernese+mountain+dog+x+poodlePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF818 17228 bytes
SHA-256: e170e5a062f226b38a93029dc30d8d4676d94a77d87987b1e81dcbfcd7ce1fbf
font_01_sfnt_off00012501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12501 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1