Malicious PDF — malware analysis report

Static analysis result for SHA-256 79085c047a0c7d81…

MALICIOUS

PDF

77.6 KB Created: 2021-08-07 11:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 73c27f40b40b69ff4053ff3a61343b7b SHA-1: 18ee4688885f6752167670a6a42ab3da2f2b4d9d SHA-256: 79085c047a0c7d813009b6a04af6d1cb0629c92c09111e22b5842ad9cebef1bf
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains a link farm that points to numerous URLs, many hosted on compromised CMS uploads or disposable hosting. The primary purpose appears to be redirecting users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2855

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 http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160971a11d210b---pukafekapuxurukujipegukul.pdf In PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/valowadotimironawugaz.pdfIn PDF document text
    • http://fizjoactiv.eu/Upload/file/59039388637.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070eeeb0f853---xisupuwokebitonekuv.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/21415768904.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/4a65c33877df2756442147f6bb54dacb/nuwurefixupodakogunix.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a04a88e8c76---wunoveripitel.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/97211389962.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/bubup.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080adec4f48c---98219224180.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c17f97032---muromipiv.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/cc8n2n3156c3vj7pk4klui6574/sokutideviw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b64c9f88778---8922239222.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8e098e7cd---35503303770.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/44394747845.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/54606662356.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/31669904552.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/kuxujozajowoguni.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/4191iauasi72o5b9nb901r75i5/dijisonir.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/jrgvtvcdvj3hitl3abr2uukf6s/dokodixelodidexadi.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/fawuvofotaxowotatezo.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9605013c0f169fd105a4adb1b2e08d4d/jideso.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/zibexuzivukazifopegux.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/kkrqi20sd3ncv3s5fe290tq0rn/13926964596.pdfIn PDF document text
    • http://ohdiabo.net/images/ckeditor/files/5367510148.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1610b1d51aff36---gagipepikesatuga.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079014d64a2f---72440729145.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=mandalas+libros+pdf+gratis+mundoPDF 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_off0000ea4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4D 18556 bytes
SHA-256: e765beb1defa3ce68de13bde1c116a7137b477f9e70b2d42444b78162d21ac66
font_01_sfnt_off000119fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FA 10944 bytes
SHA-256: fe9575604c885b81a678eaaa67521b536edb77c5ae160b436644ff03ebc80e3c