Malicious PDF — malware analysis report

Static analysis result for SHA-256 9230cee293c237fa…

MALICIOUS

PDF

76.3 KB Created: 2021-09-18 19:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f6845cc3b254d261a425b398e5b17140 SHA-1: 14604ed9bf8593565e9dd62432862d6f8d174e34 SHA-256: 9230cee293c237faa7e428ac70a6583c96fcae6dbcfe5cdd638b16ff46d54dd8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one identified as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the presence of multiple suspicious URLs indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://marymo.ru/uploads/files/dowoniwazosujuganukavaz.pdf In PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/60703772182.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/12651252927.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/xokutalusokekipus.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/zujezu.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/nofiligesanabuniduk.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/bilujepezajopazupa.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614293b22436b---73336187568.pdfIn PDF document text
    • http://lejonhund.com/upload/63016142576.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/950286736.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/29158515690.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/disikabebe.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/96274768094.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/34148359725.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/13960563610.pdfIn PDF document text
    • http://teedinmaesai.com/user_img/file/xekubakulugebukelukepa.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/80138981028.pdfIn PDF document text
    • http://arsvet.ru/img/upload/vomuliridafatuv.pdfIn PDF document text
    • https://kimcert.com/E/file/49699591063.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/68086759433.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338fdac1473---76458155258.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+connect+my+phone+with+computerPDF 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_off0000c910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC910 16344 bytes
SHA-256: 05fe2a8776173d41a3fb5147509ffbf3cee6dfe8184751f2c55cc600c85a4a4c
font_01_sfnt_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA4 10556 bytes
SHA-256: 862af7ed13bad99d7ebe9c0c3c26b1ca33f7f14552825a118a35e6f4bf5defdd

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