Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ee43d10ee9d027…

MALICIOUS

PDF

69.7 KB Created: 2021-09-26 23:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e64df94cbab4a48a504189a424f2d5f0 SHA-1: 806bcdc3da31af1427dcf8d74bb68cd1d02a7643 SHA-256: 49ee43d10ee9d0273115912ff3e8f122d358c3af9469562d7ab8acc8d7c26a91
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and embedded links pointing to various domains, some of which are compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure suggests it's designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://infrabud.eu/fckpliki/file/23696757929.pdf
    • http://studiophotosfashion.it/userfiles/files/10146206409.pdf
    • https://rtvpuls.com/ckfinder/userfiles/files/3172262596.pdf
    • http://handbook.hu/upload/page/file/kemafuwop.pdf
    • https://ontech.vn/images/ckeditor/files/polevixukoxinujun.pdf
    • https://simondaulte.com/ckfinder/userfiles/files/63806569610.pdf
    • http://pivotal-technologies.com/userfiles/file/13069903440.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f965a1455e---tupujepugap.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4rsa3rlv93amrpdhbofs6epgi6/tuwomimupapoge.pdf
    • http://photo-ostrov.com/ckfinder/userfiles/files/27457973299.pdf
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/vodubukafibuxunofokabup.pdf
    • http://plenerowe.kbo.pl/ckfinder/userfiles/files/lolef.pdf
    • http://saipanbooking.com/FileData/ckfinder/files/20210905_0733638AC78B9029.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144e6af52a8f---jawoxabepazudufizolojorel.pdf
    • http://custom-mugs-factory.com/uploadfile/files/95333916770.pdf
    • http://xn--4k0b43gkwo4gn.com/upload/editor/file/97555260859.pdf
    • https://j26clean.com/upload/files/68235826101.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/cba78fdf2b00ff86a301f6ef6077cd75/3019516382.pdf
    • https://roshnaai.com/ckfinder/userfiles/files/17096450351.pdf
    • http://0932018255.kad.tw/kads/ckfinder/userfiles/files/44098628358.pdf
    • http://alrabbanoilandgas.com/file/files/14184379193.pdf
    • http://lezeckastenakosice.sk/upload/files/14838563052.pdf
    • http://doggystylzgrooming.com/admin/photos/file/24520397050.pdf
    • http://joesservicecenternj.com/userfiles/files/zekigobiragazovamaluw.pdf
    • http://palmdale.thepokeluau.com/uploads/files/52817133009.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=super+mario+64+hd+texture+pack+android
    • 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_off0000b36c.bin
4dd9f1df443f0d91ce9576e6be993499967edf69be8a2a31fc49f6713c4db7db
pdf-font-stream PDF embedded font (sfnt) at offset 0xB36C 11180 bytes
font_01_sfnt_off0000cd74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD74 16792 bytes
font_02_sfnt_off0000e586.bin
2ec1568f24c7c6779f81f15fb091fe754b8daa1e52251e41b79d2af42badf25a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE586 14292 bytes