Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bee2ce322e857f4…

MALICIOUS

PDF

87.3 KB Created: 2021-06-30 21:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53f175ac1bee0d1e7e6b9b7b7aec652e SHA-1: 7fac0c106c7f44fc7c6ecc43acaed15b23354759 SHA-256: 0bee2ce322e857f421f4a5edec8122064d214a36d5b779c941fcceb6314e0c72
164 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • 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://archism.ru/uplcv?utm_term=tamil+new+hd+full+movie+download
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/9174e8d5e42108bb979cfae8478304af/mafazuvidexeso.pdf
    • https://aronabritcan.com/userfiles/file/ripaturogodetopowukid.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc3492db1e---misududukifuwevon.pdf
    • http://praguetransfer.com/files/file/16033427748.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160797d78d58a1---virazajizuvoxukexuwa.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1356d93d5---97792319433.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/xitesobesuguwelaxejukubo.pdf
    • http://evohome.pl/userfiles/file/65200901455.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609962eaf0e91---8872834747.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/k90eseudto6fo2rof840iqhl48/vuxirovituzulugogepufujow.pdf
    • http://internationalnetworksolutions.net/files/36266377046.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16085947e15d6a---sudomaxabudamexolisazol.pdf
    • http://smartvoicecom.com/userfiles/43172460447.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16089a7f81a1c8---27750631436.pdf
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/kixudesad.pdf
    • http://kubabus.cz/novy-web/upload/file/15072008357.pdf
    • http://gleneaglehoa.org/images/file/mewolotavivepoxidawop.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c14949a14f8---fujeguxuwotirifovomof.pdf
    • http://ferrocom-spb.ru/userfiles/files/xujawitodotobadebuju.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/fa7fade8389fe390a8fe547bd48aebec/55655119387.pdf
    • https://andrejc.si/files/file/vamapek.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607435c667cbf---7821543890.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608efb3dbad8e---39905128481.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b807f68f78f---95627306091.pdf
    • https://uclerbaklava.com/resources/file/winaj.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c955557d79e---nosopofojotiletonevusum.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_off0000f32c.bin
0f587ec59d792ca6b0ee1c8238d378eed4cae26e8c1ba5f99f6e5eb3db17fdf6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF32C 10468 bytes
font_01_sfnt_off00010abb.bin
6d277fe9ae5c7745813d718462bea18fbd9f2d24b13900dee945e69fd5523ffd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABB 17232 bytes
font_02_sfnt_off000137cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x137CF 16792 bytes