Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eee1daaa4c7af5d…

MALICIOUS

PDF

82.3 KB Created: 2021-09-05 12:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1cc89497bfe80316c0d3b8bb9c8d03c4 SHA-1: 2fcea408ba79df2faba74550e285af00e4835bda SHA-256: 3eee1daaa4c7af5d02149afc851b29ab97ba9283edd9b6b4c373d44df177a5eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The presence of embedded URLs and the PDF structure point towards a phishing or malware distribution lure, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://philabc.ru/uplcv?utm_term=pedrollo+submersible+pump+catalogue+pdf PDF link annotation
    • https://sport-jicin.cz/dokumenty/momovakajefir.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc79e0cccb---sobojafazaxirefapunuxeb.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/81910704804.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a35c80e595---penalorigifipuxujukivi.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/22488762487.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/6460279899.pdfIn PDF document text
    • https://menu2uplus.com/images/file/69693165900.pdfIn PDF document text
    • https://baptistfriends.org/media/42953999541.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16099d761b8ae1---8112505455.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/modonegabolevekinugudilej.pdfIn PDF document text
    • http://strandedtattoo.net/file/94320578764.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/161104541d0bb6---fimogirekan.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/d9822c0a353dc2e88fdc9ed0ecef047c/geroduxapibikowafafub.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/lavad.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/resenagobakirak.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/d31b03593301c719666fb81f6a4fe283/gigexal.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/41169181805.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/1958d52e9c6bc0144ef65665300c2855/japotudelodemasovomor.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ff79bc0d9.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607af7e5c0d48---bakilajak.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/80b8c9c05234e845b64658cc47dc0fae/lexefaxeverurafivevaduf.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/20490149683.pdfIn PDF document text
    • http://mweb.cz/images/file/xokixukivumazurukifapite.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD852 11100 bytes
SHA-256: d39a0980603b910b73658180944cc8c26aedb4a27055288a4a3e2352ade50c4e
font_01_sfnt_off0000f1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EA 18724 bytes
SHA-256: 2a54b5b7f165c892c9d392cd9b1780383fd421308a542b4850c3292fb31bdb24

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