Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae1373d93999abc…

MALICIOUS

PDF

98.6 KB Created: 2021-07-25 12:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f0eaf0e2ea220322ea6d06c82ba79e16 SHA-1: 8e73f5cf89d3cfe748d4e21706f295f253fdeadf SHA-256: eae1373d93999abcf9f29f2f320b7bf8000fd6b55fb01ae49adbdcfd47951fdd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and embedded URLs point towards a common tactic of using compromised sites to host or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/965ced87326d317398985b26e71147d5/nitesujexogunowibusojob.pdf In PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/dcf5ea429e7986cb19bdfd9c2bbe8765/20602926525.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/85105043314.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/93835144360.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/zananizugigefumisag.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/id5c225q6l6j8kq02tbjnchuu3/xunemuwuxonifosizobufu.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/dewedatipevexezawaku.pdfIn PDF document text
    • https://afayl.com/userfiles/file/fotimopibigotajer.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//39234034770.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/56147198616.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/48801284573.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/guliluvabirugodamevap.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/3dc24795bcf04e83abea5dd7eb5c2a5f/kekoranibat.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f14538ad5a---powenax.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c28e1fbcb21---nuxutimepopugok.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7ab7de3af---6107429090.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/2654075056.pdfIn PDF document text
    • http://bakoca.hu/files/file/bumofugudowiwatimefemo.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/xidigit.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/vexojexogozomukokoripu.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/90689776045.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1a1ded8e11116877a4a6a4a4a936ea2e/wojog.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/labebidulaparolav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=cachorros+french+poodle+mini+toy+de+venta+en+ecuadorPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD3 11196 bytes
SHA-256: 7348ece30fe3d7577fb604d1ca118a37492de1ea44e816a35ea1d1dafca04d41
font_01_sfnt_off000116e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E2 20024 bytes
SHA-256: 85029e3278417bde50ee5328a5226a199b5d42353c58dd6ac904f8a0d99fe7a9
font_02_sfnt_off000149fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149FD 17384 bytes
SHA-256: 62cd132e3014689619ab99a71e4d75afa88e5db8e4c9c477ad645cccc24727f1
font_03_sfnt_off0001644c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1644C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.