Malicious PDF — malware analysis report

Static analysis result for SHA-256 14344e90baef0968…

MALICIOUS

PDF

82.5 KB Created: 2021-09-15 07:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9e592ea0bc664722711e0053316aed9f SHA-1: c396a57da9d778f23d488a2e1d0a4f513cf28d08 SHA-256: 14344e90baef09686a66a3a287a830e2a34ecb79b5448f5f5da3571445c172b9
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 or disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this. No scripts were extracted, but the overall structure points to a malicious PDF designed to redirect users to potentially harmful content.

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://foodvellythailand.com/upload/files/26912788568.pdf In PDF document text
    • http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/19126956131.pdfIn PDF document text
    • http://rooptex.com/uploads/refeferanilimaso.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/5f85qvqnk6ppsftj047pebqbvl/wosekevizimipemesa.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/9a0137129d8c8c8221086b4c371b304c/90991862805.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/ditosotagawinezu.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416ab03e8b3---kunomefaliwowomekufevi.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/30860854576.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/xaxodolosabavevowu.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/xetajadetafitujimukib.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/82517681826.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/72119120293.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/redegetavikuvesad.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/65406031232.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/56603820207.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/3279623496.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/4160294429.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/96899092694.pdfIn PDF document text
    • https://khanoomhoteli.com/basefile/khanoomhotelicom/files/35346665497.pdfIn PDF document text
    • http://rld-carbon.com/file/79301546749.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/85863502890.pdfIn PDF document text
    • http://osayit.com/images/file/47030590656.pdfIn PDF document text
    • http://sutipatika.hu/userfiles/files/zaxevisa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=problem+downloading+apps+from+play+storePDF 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_off0000d9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B5 11184 bytes
SHA-256: 40b5e3c9ac4e4948269fd35d3bcae0233daf63ecf1147f76f62a2fb0d550b359
font_01_sfnt_off0000f37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 18968 bytes
SHA-256: e17945b17f79face4f6c0e4b5e3d093b561ba71e60e1d59e50e5b13450da7106
font_02_sfnt_off000123f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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