Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c39ba9e5c87edf7…

MALICIOUS

PDF

91.5 KB Created: 2021-07-10 08:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d56d29d4ca3e64efba5850401717b72a SHA-1: b493f54ae250416f18ccb8951dcf66ea14992fc9 SHA-256: 9c39ba9e5c87edf7255310b7b4bfee152dda9e61d34899f2763e08e15bdc4f87
124 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malicious intent. The file's structure and URL distribution indicate it's designed to lure users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3565

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://hitecds.com/userfiles/file/23950177627.pdf In PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/459da05de75b8301c5982bfdb419b92c/87760219816.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/14023933583.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/a709d3bdba5bd18fab5633aba8212ab8/toripelunefur.pdfIn PDF document text
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/jitadabetepibobujapewinob.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/9de0ef6d92e9a7717e26aed31412690d/folizikelegomatur.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/surobosazudumuxaroj.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6182a0620---22275196968.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/feredovolukutuvuxidif.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/4k3vgoh3tk36pp40qb972ea795/gikezojobi.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/pabufedixofodolovuwi.pdfIn PDF document text
    • http://soflocops.net/clients/81266/File/17696496016.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6dcce69547---69001241443.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076088142929---66695743671.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/36c03b3b9c557490ec82cd26e4cad3b2/gulivupazoviwolamiv.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/biwukelajakumovegamevil.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210504111347946989699.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1104d7fe00---sasegodopefemi.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/resanefakesele.pdfIn PDF document text
    • http://3asoft.vn/img/files/xuxesome.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/84022213065.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096de00a616d---67323282564.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16083604c7b385---82434766462.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+4+beauties+of+chinaPDF 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_off00013caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000154c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154C6 10568 bytes
SHA-256: e081179962151e89b065c4f0877d727d96e4b6f9d704d8380f486c284bcd7b86

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