Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30b3b79673f58fe…

MALICIOUS

PDF

102.8 KB Created: 2021-07-01 20:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dfcdd3736912a30b8ff5a6496158b903 SHA-1: 1a006dcda6e21dfcde0364dfaec7a7427e0b9c50 SHA-256: c30b3b79673f58fe3fe658e3f7f43431fb324590e22f7e97f66e9c0751dc5c72
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', and an ML classifier also flagged it as malicious. The presence of multiple external URIs and link farm heuristics strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

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://france-ex.com/pojilejiparobuza.pdf In PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7ca74d002---60099399651.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/50473495778.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/5v0rifu4remrke1vrq8vralgjp/20441751024.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c8e74b33dc0dc78756cfceac14c115d4/ninejo.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/5baa904559f4df443b4a3d65917a5a04/paxegafazogofefugir.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b65aa4eb9---sawavedowulavozuvus.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/luwezexazovo.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607f65af18ee7---21809206729.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/tozajokox.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd93e90ee2---69618506120.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/mkumgmrnnmje0v898i0b946k7n/38592136029.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/f4a1022c2671e3b2ca082159af8dbbe2/66467761652.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/578d2055209aa5ad4f0ab379f043fc56/lojazivalerekig.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/55679360638.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/98848828364.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d1ecae89f---96457232891.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcece042db---fudevolilitunaz.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/883953dc4880415e3dc001abf422a04a/filidixibodeguzalal.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/85546023340.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/wawemeduwab.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/0ddd719667e9bac4b9d088a159f05288/96194332404.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/diwilatimosefojigezi.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e29ae9b7cbdd7ccef5e4b45201279e73/vesemedusatukax.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bef633d7ac---nudaxireferotufekav.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/858d767d6d469799201680bd245508b1/gizejijebukopamameke.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/66020489189.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=ring+theory+and+vector+calculus+pdfPDF 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_off000110f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F9 18992 bytes
SHA-256: 84afa3b89b564ae5de0da75485ff00e9743de7f1b74382b8fb9e5ecc0bc38241
font_01_sfnt_off000142be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AD5 11224 bytes
SHA-256: 1fafe752e91199eef5d72e63e103fd9cd2b2c2ad6fcdd32884a725ec0dd0845d
font_03_sfnt_off000174e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174E1 16448 bytes
SHA-256: 12f3da21d01a50d74ec65ca2121b22c7a7d05d396a65e81f20bce2c95a0d07bc

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