Malicious PDF — malware analysis report

Static analysis result for SHA-256 727dce2f7f7e52ad…

MALICIOUS

PDF

426.9 KB Created: 2021-07-03 05:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83909d19f048257fc237424bb2ad7ac2 SHA-1: d4ac7873b53b861d021b6d98d764325e6a4ff182 SHA-256: 727dce2f7f7e52ad50491ac927bee17ecfdcfe8f16a2a9a944f34537027ad27f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains multiple external URIs and links to compromised CMS uploads, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8722

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=oops+lab+manual+for+cse+3rd+sem
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea132e4fa8---37286336032.pdf
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/73041948392.pdf
    • http://bioscipublisher.com/files/upfiles/file/61114311434.pdf
    • https://cape-electronics.com/media/file/jizazajuxerun.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160797dbd9c5e0---kovulogilixe.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/dalmm1tffufpjomguks9o9d7tf/fetere.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec06bdac49---rosunapijaka.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077bc59a9252---dodemenafipax.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc30d825f6---83132960009.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160de2b366e066---54031113378.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/f793abf57e731bce08b39d5bf1516dab/sezojilatuxi.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d56ab06906714ef2fa75a1295e42be45/vegewu.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160879769c2be4---81507030899.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/0b6b190f84235a40bf03727b95dadf86/32542056472.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/73ed3cf04ca40f5c255b0b8a88ece781/relifizezejisojule.pdf
    • http://dfh-consulting.com/userfiles/file/1036143113.pdf
    • https://genericdiabeticteststrips.com/userfiles/files/furodujigeketefefana.pdf
    • https://stopserv.ru/files/file/12455360508.pdf
    • http://terezmisszio.eu/files/file/74644270351.pdf
    • http://compsult.net/userfiles/file/popigifexoxasojefo.pdf
    • http://www.contectrade.hu/fckfiles/file/96056917354.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_off00063c71.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C71 16792 bytes
font_01_sfnt_off00065483.bin
bd035567e91994099156b49f0a33085549411beb3dd56f8071a8d7567b4b4aa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65483 17008 bytes
font_02_sfnt_off000680ff.bin
3b26dacec25830c91e9c1c5c923166642fe1cfe745bfff37551a0ce4ba7e80fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x680FF 11028 bytes

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