Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02d57077add43b3…

MALICIOUS

PDF

87.7 KB Created: 2021-07-16 22:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e264c2ce9dd2100b593bcd8531e5fff0 SHA-1: f7bb7aace1322b3bb85fe7a1b993e2a590ce2e13 SHA-256: d02d57077add43b31924b2750f3e3e20cc7dec494e5bf63676b799ee3dd91f7c
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608e66f58c083---zebesubogafalikimagibut.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a18a1923d7---50921990417.pdf
    • http://brunsfamilyreunion.org/clients/e/e7/e70b0594429ddd28dfd4dd2f61c76e80/File/fenexateja.pdf
    • http://sierrahighalumni.com/clients/878712/File/bobomimenizarepepabimekuz.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704ffa26758---23850297846.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e772e191e---39043480159.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a833db12baa---99836776468.pdf
    • http://aarogyamedico.com/userfiles/file/woninadezukalitexebew.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33f7593670---21070671326.pdf
    • http://archetipoingegneria.it/userfiles/files/sobokufubejobavuj.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609497d10856e---wafirulapi.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/2d979cd6b24be1feb14ac175f26d9a13/kobusupofibol.pdf
    • http://phantasos.org/userfiles/file/mumaxabakoxu.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/e36ba53acf02d1d86e98d47a588a035f/nalozegodumobolokuduk.pdf
    • http://moyamoya.center/images/hand_uploaded/files/50056087948.pdf
    • http://myphamlulanjina.com/upload/files/54804627299.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/ls6o8cqgm94d6lcihr7gfar2hs/9645285408.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160da119158d09---55540293470.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf62a27973---nisutag.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d83f1ae55---lukuxobokelufawadugog.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a733ae5c1f2---36680223432.pdf
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/92444231668.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=lemony+snicket%27s+a+series+of+unfortunate+events+online
    • 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_off0000ea0a.bin
507c72363bd5931bae10ea8a38cc08730648b190705933ff68f36546fe7068e0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 10860 bytes
font_01_sfnt_off0001033d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1033D 16792 bytes
font_02_sfnt_off00011b4f.bin
5e7b070473d73e9473ee4ae82f675660d0691ae5a29a158a6de60ae74ebb6a64
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4F 20944 bytes