Malicious PDF — malware analysis report

Static analysis result for SHA-256 971897a94338df0f…

MALICIOUS

PDF

911.6 KB Created: 2021-07-02 02:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a704ea8e985c827570879684d244872b SHA-1: 2909574c435bdba6e6008903b8c9d1d1424ed630 SHA-256: 971897a94338df0f126377d2f83164d1b28c0f015db171c7e3bb24e844a8795b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links pointing to compromised WordPress upload directories, indicating a link farm designed to host malicious files. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The document's structure and embedded links suggest it is part of a phishing campaign or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3437

Heuristics 5

  • 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.
  • 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://starwindows.ie/ckfinder/userfiles/files/wivujo.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cbf4054f9---rutewuxopiv.pdf
    • https://louvre.lv/res/wysiwyg/file/18965218401.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608677aee4c89---luduvet.pdf
    • http://darec.sk/files/files/37785579584.pdf
    • https://anitacalderon.com/ckfinder/userfiles/files/wopotovadabopiweriku.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/fc415861538e8e0d2638b93e64337398/rinunijufab.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609758aaecb82---82675339904.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081e30397d15---62394359775.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9b1d8080b---revajomapinorebazo.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/gp30b43p40q80bnhmggdt0aqsi/fuxojarorataluzumuw.pdf
    • http://ck-kutnahora.cz/gais/image/file/44950698475.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/9f10799dcb4a30fea9ee92715891f8ac/35133217241.pdf
    • https://contabil-fiscal.ro/mm/file/zexenejigopet.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/2d35be48a5e47571861efcd6131e3f86/30115586642.pdf
    • http://mdbim.pl/ubezpiecz/obrazy/file/59105863099.pdf
    • https://bruceleevideos.org/images/file/gudefijarepuz.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/1c98cc0516e0fe476e3c206560214a0d/gebewaxoboxelitometi.pdf
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/wudomagifas.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070aef7e4760---70387911077.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16250317726912.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/bhtjma4pbm73kb909r67mcld81/15368242137.pdf
    • http://banphimchuot.com/userfiles/file/litosutoguzulawitifut.pdf
    • http://bigpictureresources.com/userfilesbigpicture/file/jorovimaku.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/14c62357911601d13f0533cf719cb85f/29366197858.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=mystery+in+easter+island+ielts+reading+answers
    • 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_off000dacd3.bin
864a25ef3ce54b91a7c24d2e19a30ac3d7d470f48a8eec02928ca61598fd23d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDACD3 10496 bytes
font_01_sfnt_off000dc4b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4B0 16792 bytes
font_02_sfnt_off000ddcce.bin
cef260467d3790a8b5448ed6c09439c146bf449ef25155cf22a0b81c21a049fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCCE 20936 bytes
font_03_sfnt_off000e1109.bin
f08854ab5c0b05ae4e82566881f7149e68d0bf916c32b2ee15c03d76e7cbc70c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1109 7112 bytes