Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8161e2fb2717aa…

MALICIOUS

PDF

86.7 KB Created: 2021-07-13 17:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 30ea5f0d861580fabe997c12aef234e6 SHA-1: 1fb78c4a7ad74a725824fbe85ed6bda042511944 SHA-256: 0e8161e2fb2717aac9351341c0e6b2b15ae42dac69797df5e815a1a80fa6fe86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the links and the heuristic firings point towards an attempt to exploit users via web redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/535c25dff9f0d9cc32bb49f3d6742d67/9707166156.pdf In PDF document text
    • https://cottingham-group.com/cufiles/files/65994125084.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/df19fba9eced25b72bcadda46ae164ea/vijuwexoxijakuxavomuzadon.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/284df2f44358847e0df06bb8788d31ee/30578977948.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7d6590fdb---67086678763.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/943ae6b2d8cc7e380917260dd6e3deee/lirutesalafegizukijaxegig.pdfIn PDF document text
    • http://cci100.com/clients/57496/File/52020003815.pdfIn PDF document text
    • http://wahibluedevils76.com/clients/5/55/55d7338a7abcce318bc847d7f34994f5/File/25286619460.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0f9eef09c---72204440958.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/basezolotakokozafijakufag.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/f7825f06c30087bce76eff243b86153a/573734282.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/fc6aa3d01ebaf9fd5c3e251dd586121b/xewifidu.pdfIn PDF document text
    • http://cocoal.com/uploads/file/powavisezufidojegavu.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/nuwefobonipulo.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/63b9quue2v978jbjbrfd9kg4m6/zebovijuxesojijedez.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/ee1d1c58bbbff038a01c514357589f90/49408203898.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/vuluvofogenigewivo.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ort30sd99cr4c8n78macdvhrkc/98838096838.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/tememetujepibuxalibafu.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/sumajikanotiwulano.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/m0gd18t44630iivbd54scr15er/nuvulavumevikom.pdfIn PDF document text
    • http://tiyuchangdi.com/upload_files/files/20210702_113559.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/02ri39rt7n1nqbvpqgv1p7frj9/xaxobutobidepo.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/79a3e7c9115acd47249fca40d7209f79/12243953351.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=the+godfather+1+full+movie+onlinePDF 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_off0000f088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF088 17344 bytes
SHA-256: 417efdd57f03e911a7f9b5432564b5643e75bf0be7de90d4896452bcfadefd8b
font_01_sfnt_off00011cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB3 10812 bytes
SHA-256: 0a2e9f01f3cc399045ff4c7d18362abaa486e08ee815af1a5a65d1877a601967
font_02_sfnt_off0001354f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1354F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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