Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb72fb5983db4bd…

MALICIOUS

PDF

74.2 KB Created: 2021-09-06 16:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 732a49c4ab0ce2e6b5ec70748b29d154 SHA-1: 88014630b34804d8769e8140cd7a0bb31571a427 SHA-256: 8eb72fb5983db4bd2d0907513c506bb0e67d7fae06ee55e3315e86378fb11722
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to external sites, many of which are hosted on compromised or disposable domains. This pattern is commonly used to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://transilvaniafishing.ro/app/webroot/files/userfiles/files/taritudebo.pdf
    • https://mayxaydunghoangphuc.com/userfiles/files/jipozujogurisonovibenone.pdf
    • http://dent-pro.cz/pic/file/lalujuvowivunoxokibakor.pdf
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/43637496573.pdf
    • http://ural-resyrs.ru/data/file/disenekumuke.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-22/20210522031524985596.pdf
    • https://picinterior.com/ckfinder/userfiles/files/23194794773.pdf
    • http://aptchasers.com/FCKeditor/userfiles/file/bawipanumofewefirizu.pdf
    • http://interreg-ipa-husrb.com/downloads/34149424483.pdf
    • http://brilliantsolarpaneling.com/userfiles/file/jaxupabife.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/68f54bddbf74d90ddbbf7a22e1bbdc20/majofigivaduveroregoluna.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/q28u4jq92472dmh1s0s78v3gdh/guzojolugibixe.pdf
    • http://impactpluslearning.com/ckfinder/userfiles/files/xaneferuzuso.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/c9jk7qe2j04uf7tqmrekro4660/kejibobitu.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609baf589eeca---memepefuluninubenesofixot.pdf
    • https://seedomoretravel.com/files/files/wubagagomalipokomidi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075902dee6bd---78717407777.pdf
    • https://nedimgame.com/calisma2/files/uploads/jovopopebewoposidigemi.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/d992dae98d7845ff9620fd69f22cdf3f/kuvemodat.pdf
    • https://plagij.at/ckfinder/userfiles/files/10084435380.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed2a7b1dbb---97442266924.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb8a9ccdb4---xugedijador.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160830e18c4324---pujidepavelupu.pdf
    • http://parejalecaros.com/adjunto/upload/fck/files/zejarojirupebixelosasu.pdf
    • http://eg-connect.com/uploads/editorfiles/file///44012384822.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/6f5acb2315b6ecb8bcd8a2810d734447/66266815214.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=african+country+capital+currency+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bee5.bin
86f300d4ed6b38e1785beee2527035e65fcdf1fc7c7b0547d9865ee8466f8d5c
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE5 17284 bytes
font_01_sfnt_off0000eaac.bin
c1a2899f790ac63ad46a4f53890cff87ff465df6a5ec1a1acb857f2dafa6cd64
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAC 10640 bytes
font_02_sfnt_off0001032f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 16792 bytes