Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6909e1ad7b28730…

MALICIOUS

PDF

63.7 KB Created: 2021-08-16 22:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 65462f052009dae092e9f7ea989410eb SHA-1: b3981cc0c19975374b77445035c327021f51a784 SHA-256: d6909e1ad7b28730040ebcae15ef8b386e6eebab0b7f5221a57cee689eaf8c2f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for further exploitation. The presence of embedded URLs and the PDF structure suggest an attempt to disguise malicious links as legitimate content, potentially leading to credential theft or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8670

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://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/8c578a997d0f145c247f45c5accde8df/18384062805.pdf In PDF document text
    • https://afayl.com/userfiles/file/safuvab.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/zitunuw.pdfIn PDF document text
    • https://anfauglir.com/images/file/16144544724.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/0158144b288080538694b0b1423be6fa/33935891122.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088b1828407c---90849879576.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2fa48da5d---27934290390.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/f1546ad317c832f6c9bd86efeffa2ed1/41001325936.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/gfdet76qhpb5jukd4imi6mh787/minilalagogibazofutas.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075959ba71ff---zabemapasidagunolupipu.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/6194934260.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210715_EA5BE1FC208BFB3A.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd78f82ac2---64611004980.pdfIn PDF document text
    • http://hrudolf.com/userfiles/29400337914.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210716_A195469942618422.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/saduxofiselewonukufolapu.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c9873b6cbdde1ac735f7015f8962e3d4/kukov.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/vobepokeporuturajina.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a850213009---17402938690.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/41891317809.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/17320393606.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c528c1541---paxevapizuwanedibolove.pdfIn PDF document text
    • http://xn----dtbfdwc0aaaev8k.xn--p1ai/ckfinder/userfiles/files/85892024661.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=antenna+design+and+visualization+using+matlab+pdfPDF 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_off0000e1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E1 11088 bytes
SHA-256: a5978d34cde0f152b311c195994584a76390e647139570269be0df9da3ad570c

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