Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1e05b9d68491fe…

MALICIOUS

PDF

80.9 KB Created: 2021-09-09 19:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5daa555a43a532ca185c09ccfe422908 SHA-1: 6429faebbcad0f6c8497c61fe87c4b6fd8579665 SHA-256: 0d1e05b9d68491fe1a5768c7e858c2943fb4c6415c21b526e319a0c6ae0e269c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to disposable hosting and compromised CMS upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely attempting to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://clearpatth.com/userfiles/file/61204978839.pdf In PDF document text
    • http://goldia.cz/data/file/wakosabigawufisuse.pdfIn PDF document text
    • https://innotek.vn/uploads/news_file/38127029211.pdfIn PDF document text
    • https://taptigrihnirman.com/singhania/downloads/file/80353404091.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/mizakoxojugexenoweziwipu.pdfIn PDF document text
    • https://bloc-immo.com/images/laduzi.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613805d34debc---55732269927.pdfIn PDF document text
    • http://unixsensor.com/uploads/files/202109051223009029.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/56813417339.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613170a770f59---1917728437.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/93427683285.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/92400974977.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/89012018781.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/vejobigebapix.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/66216826873.pdfIn PDF document text
    • http://progetec.org/userfiles/files/81556030937.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/98360210250.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/belolodaterilikar.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/napefavatowon.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/tobilozu.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/buxarunimunabajafexija.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210905051818.pdfIn PDF document text
    • http://tincorner.vn/uploads/files/muwikiwisorexazagu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16134697db4dfa---45620560434.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/46211065775.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pokemon+let%27s+go+pikachu+download+without+verificationPDF 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_off0000c95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95F 21832 bytes
SHA-256: a50bf434dfde9c50944ffcc57328fd5e99051565f33e02cf0e50fa71e4af4c23
font_01_sfnt_off00010234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10234 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4B 11448 bytes
SHA-256: e819c2d4ea9f095c52f42ba8f09a5be0bfe8a9eddfe07bcadeb23329ce337e68

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