Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0ad255eeb4ce8a…

MALICIOUS

PDF

92.7 KB Created: 2021-07-24 07:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d40e3cd6b358408d547ccc750bdc0637 SHA-1: 0c26ad3a764f1ef4924fee6de756a2b51e3610b7 SHA-256: fb0ad255eeb4ce8a7ef38e419e452f8774915301f1bbdb978762a9ca967cfebf
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://medicapoland.pl/uploaded/file/3437003028.pdf In PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/nq30d20lu2skdi2ksl8h9qe57r/gaginorusilereninagemetob.pdfIn PDF document text
    • http://cmi.nfe.go.th/ckfinder/userfiles/files/fomagibovax.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/5288224725.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/45621771217.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b7e01ea795a68f99621f89c332698a94/45272219852.pdfIn PDF document text
    • https://ivaco.it/file/60830898003.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/89b6f90c96eaccca3039f45325ced88d/76219261966.pdfIn PDF document text
    • http://www.hcc-cpas.com/siteuploads/editorimg/file/36443052011.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/i5srmcv2kko1ah82o3b5eck9gb/56885657757.pdfIn PDF document text
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/moxugitujatas.pdfIn PDF document text
    • http://braghieriarchitettura.com/userfiles/files/vinajomatevukote.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/91bd6ffa67878c371e39966fadfa89e5/5928779162.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ff5aa0ef4---12588598625.pdfIn PDF document text
    • https://etadelloro.it/images/file/rapemerumerajakugefokate.pdfIn PDF document text
    • http://hilltopperalumni.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/80670526849.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d835b0f0cf---kulisevux.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/2f82fea8cdf067911f5376702143c64b/42622361382.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160847cb98ba58---71239895547.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/a7fd96921df0e28ed10ca14d2a865d85/jejujuxo.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9f2395583---xidoxaged.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaedfae8992---fajinujadaw.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/nawajo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=sony+genezi+mhc-gtx888+fallasPDF 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_off0000ebb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB8 16452 bytes
SHA-256: a27ba0950acdc488df4333c1b0b2f79bbf1abac0b0c64ee30de841c306cff1c6
font_01_sfnt_off0001024f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 11276 bytes
SHA-256: 55e7607a7e2aac32f94e0bfb99a95aa4837b02a7f9425934f097a5a40354e699
font_02_sfnt_off00011cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBB 18520 bytes
SHA-256: ef160b91228e3fefd1b0d407b8d4c8c74ce6b04d56f0ca71596025a39ebb614f
font_03_sfnt_off00014bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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