Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a5cb601b88dfb71…

MALICIOUS

PDF

73.5 KB Created: 2021-09-02 04:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9721f0ba40c2545db8d86acfd0bd44fe SHA-1: 98ddc5e964ecc502a488e05bbd4c418761d7dbec SHA-256: 1a5cb601b88dfb71655f5ba3400bf5eb252557bf7a4c919656ba6a10bfe2634f
124 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The embedded links suggest an attempt to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3916

Heuristics 5

  • 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
  • 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://beatmuellerfoto.ch/userfiles/files/86239846670.pdf In PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/34894952216.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210623_B855D732931EFC2E.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/1628855705.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611c76ff50753---82074286076.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/1a2502df1764663e1c974c5680fc2b94/26021772979.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/65743598973.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611efc55215bd---zuzugu.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/fuxazabapu.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/bosefibigopu.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/44754443430.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161116ae330d6c---82704215840.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c7c5c3941---61938952726.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/abjf32rickiab0ncfit12nbek7/40930592814.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/27890968603.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/lemojeravenuxiju.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/69368352603.pdfIn PDF document text
    • http://wdnederland.nl/file/nakekaguxowupopus.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210724200242_g6rmnp.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/3198f5b64f119a8bce7544b9dd000df9/xamenamipeb.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/98695647986.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077432940b3c---rozufamomijarelur.pdfIn PDF document text
    • https://redac.ch/upload/mepem.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/14977290268.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/fedaledusar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=terry+macalmon+the+lord%27s+prayerPDF 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_off0000d94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF161 10800 bytes
SHA-256: 840d5d5594f32fd237683f44b7f4ea350ff4b5bbea7625bda41d916c97965b7b