Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc74850292bfe8e1…

MALICIOUS

PDF

95.5 KB Created: 2021-08-04 13:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 58ee1725bfb615ba172754f40d024e51 SHA-1: 2acf6df189695436d7b2b6644a61f36a03b1a5d5 SHA-256: dc74850292bfe8e153f1e56b1c70ca841a516a7cfedc6ac69c492d13f4d08917
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or trojan distribution attempt. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and potentially disposable hosting. While no scripts were explicitly extracted, the PDF structure and the presence of many external links suggest an attempt to lure users to malicious content, possibly for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/c47aae1493805fc11f77cd01ef573ee9/64225623412.pdf
    • https://n-v-v.dk/userfiles/file/10630698819.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c284b420f---pizoxejumorek.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fba22f48c---jowenigafiguzarofobi.pdf
    • https://feniks9.ru/ckfinder/userfiles/files/6180334766.pdf
    • https://abofahed.com/userfiles/file/begojuvudezimepizefuzibaz.pdf
    • http://martom24.pl/martom/userfiles/file/gudilajepi.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/39d12902deadf4cafe80b590d59253f1/rafizeme.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/12fcd1644d5abd378568682ee235008a/rugusiwafure.pdf
    • http://virus-safe-zone.com/ckupload/files/lirelodawarel.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/uvipmb5qk2g8ldpu9vklkv6rc2/pamotazixobep.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/a6b45ab9e3378ca9172232609bba011c/46954298786.pdf
    • http://arunimaflavours.com/userfiles/file/turipepinuxiraxado.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4ffd1dcff---70356954834.pdf
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/9183650bf173c5fbf11044c7f5d0e4ee/68757884923.pdf
    • http://sewakendragroup.com/userfiles/file/zurikogimuxumisin.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607676a44310e---feguju.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/cmbu36re29cuirrunslrctgng1/bojagumamojivem.pdf
    • https://binarbaidequipment.com/public_html/userfiles/file/wogebare.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/h0lavjt26mg35dqoshhsgut64k/tefupezelate.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7dc6d98dd---nolabefoxepikosenures.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/q860ogvi622b31g47v78fc0kg5/gikababobifov.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758f3206ea8---birerareveriv.pdf
    • http://briarcliff70.com/clients/874901/File/rekeworananipeterugo.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/664b3e51f9073a83ce595883f0b0cf28/14103132610.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=always+on+display+android+9+apk
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f44e.bin
ef56fdacc6efa76d315e4c7d6988b1bb06380bbdc2955a62669edb860e6ccda5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF44E 18004 bytes
font_01_sfnt_off000123e7.bin
caab827300fcd7512b38a4ac9629bf9a0fccd8c539dd22c4864da3cd4506bb79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123E7 17560 bytes
font_02_sfnt_off00013e47.bin
c086e89876d5277a83452c3350b94f0da638cb193d2987545c47f8162ec5ff03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E47 10596 bytes
font_03_sfnt_off000156a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156A6 16792 bytes

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