Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed143a2eefd1416…

MALICIOUS

PDF

92.2 KB Created: 2021-09-04 21:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8fa05e1f6fd6bcda6cb3cbb8c26ef0f7 SHA-1: a09c18d06deb468395201b5b5ddfa9cd7c16f03d SHA-256: eed143a2eefd1416e0b17e63116ba68aa030962dc0ed53e995e413b907b9116e
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites and disposable hosting domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/oql3er91kbahr3p6s5t7lsj8s1/52273149783.pdf In PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/1cbo5frg7o9rpvc7ui3evthg06/95599140499.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/23326904992.pdfIn PDF document text
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/tapixedolovozewuv.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/jiguro.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/oe0mcllr7rraeq612ajgmaevu0/94955319142.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/sigixesobiwanepa.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/e49f7acde77230edb66d43bd3b47dc15/femawokowefetexowiwop.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/68582229028.pdfIn PDF document text
    • https://ip-pharma.net/data/files/37734122457.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/24254694649.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ufc39ogajp1bft31r32ri5mjdn/motuvubozugebotiropugikef.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/31182633005.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/fewukeridatib.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/20875b9a9c043eec2df7c0b5506f79b2/80524006333.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca3c9aae19---12761733474.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0453043f4b0ecdc415fcbcdbbf120121/fiwavumagaji.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202108312043242219.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3a2dc0320---fewefonageraka.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/78715368573.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/12631484837.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/f78c289bf5e3e70980ba272dfc4a2c46/modexateniwam.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/e475fdb13e514b27f2d073d967110a33/sefepodapebuganusarik.pdfIn PDF document text
    • http://monkeytailranchdonation.org/clients/e/e8/e82116dd0b5861b0917add2a69208af2/File/61967942830.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e584f87196---79909352961.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=stata+commands+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001033c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033C 10484 bytes
SHA-256: 14c63a9f14bf5dfe0fb1b414b6e27e9c439bb8ff087fc0c09ac30f9421b4b38d
font_01_sfnt_off00011b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001331c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1331C 18772 bytes
SHA-256: e4eb415be01bdb82a6f71336640c1527959eaae7f45fab6a6ea52eedaa00e379