Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d11950f6065f57…

MALICIOUS

PDF

86.4 KB Created: 2021-07-15 10:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 38ea42d7de52a523bb476087523a1088 SHA-1: bb923c2b3a5db599205d91b05e77fbb2b0f003e0 SHA-256: 89d11950f6065f57f363b14ccd17869c704ca006431b8b9c57cc1a43f212da40
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised or disposable hosting domains, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://colegiumaniucarei.ro/ckfinder/userfiles/files/walinop.pdf In PDF document text
    • http://batiment-tunisie.com/userfiles/file/zedubidasezovifeso.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16075a12487191---8232521234.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/45081079053.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/49690309426.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160903428b5aaf---61284152422.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16090bc702bb8e---84520575669.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/caea8ec4c3f0df44e29c2f72199f9184/35472553098.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/45c5ff0de1b61787b8b0b30fa20a8a0b/jokafubapimosojokipaleziv.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/48606306605.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c2acc97c470---91726030302.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/50747527047.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/81821283350.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868b5d3fde6---nikelejazodudut.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2eb5120ddc---boruvadejewipivifuboxoga.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/b672d273d8411fdeaf86d33324311af0/15458640121.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/efa07ba7f9c50f1e3e23aa8c57e6feea/19197045964.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/vaxigaguzojavafiwuzut.pdfIn PDF document text
    • http://thamdinhgiadaiquang.com/img/files/ninitu.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e81228a7bd---79701951231.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/84471223020.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/b69bbc7f77ed65977159b4a5515269d7/8825273351.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/jomureruwafudoju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=fear+of+pain+phobiaPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 10260 bytes
SHA-256: 956a35e3ccad48b0b0de5a43ce8d2c68e6998cec6d41f5de87e7e6a02ea531be
font_01_sfnt_off0001094d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094D 16952 bytes
SHA-256: b98affdb38e600117af16bd5ffc60fc1f822486c4252318322ed80cffcf21415
font_02_sfnt_off0001348f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1348F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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