Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f9619dbcb4710c…

MALICIOUS

PDF

80.5 KB Created: 2021-06-26 01:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b79e7ba25fd77bd751b2a755204edc38 SHA-1: 3b92d53b45fca9c3dc3aa502c4c47945a2886156 SHA-256: 41f9619dbcb4710c8d9c00e90b61962389a4dc1169d66a0c43ad3df1ae59b14f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://cructi.ru/uplcv?utm_term=how+to+convert+pdf+file+to+jpg+in+windows+10 PDF link annotation
    • http://mobilesamara.com/img/files/file/mububosulaziwidawab.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/mujanagedumetejofejufozuz.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/4f4b2ded2b0cc3eae0e9bb4be263433f/guwotexokolanurakep.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/41e9d4bc86311b36709aa1f4f4d418f8/71079125525.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/0p0mde6ft3npkudce1ensp5sod/pojupibedafasodolevidi.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/59930926249.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c85dd8f318---vuganipugo.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/0aae9fc001dbf831ff4742f142cf8c63/tesidifunaxi.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/9846268970.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/bf484d99e4154cfe0850a879ae605292/23931485924.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/viwozoguxoneli.pdfIn PDF document text
    • http://strandedtattoo.net/file/7946871245.pdfIn PDF document text
    • http://polletnv.be/uploads/files/lukuzewigol.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/05bf5c16c8860fe551cba903b4204cab/borofid.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/60219502964.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021528205446542.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/8a6b41d6183cfe364c8798d466e30449/fubilodilamajasom.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/14542656139.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/lesikevumamopefib.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780d3aaef79---bamibokibubegegexibak.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f52587323---pigidoxowarujojemigip.pdfIn PDF document text
    • 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_off0000d655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD655 16576 bytes
SHA-256: abe3d5fe11f1c22f0b5a0f585e57eb6db9e68fbe2bb7e4425d0f00596a68b4e7
font_01_sfnt_off00010145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10145 11080 bytes
SHA-256: 92274e34e974fcc9adaa76436d192b02679eaadc88f1bc4efed3b9f3ae518516
font_02_sfnt_off00011aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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