Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2fd0387d3543aa…

MALICIOUS

PDF

86.1 KB Created: 2021-08-05 05:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 50ed8bbeb46e0c9c3e5a5c8af220f305 SHA-1: fb339762209493b9f2da1395b68797bf9d37c28f SHA-256: 5d2fd0387d3543aabb0b0088db4586601712dd5504347acc13d33e46face6b88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f64d1530d---28089649514.pdf
    • https://patoman.ro/ckfinder/userfiles/files/81741432661.pdf
    • http://chokmanee.com/userfiles/file/30932499098.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160770c1fcab4b---30019570712.pdf
    • https://luatkhangthai.vn/upload/fck/file/vawolitenagapudibofawezix.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/1a8e7413061ffb80dafc8419854898f6/wanafekejazitezar.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e169652cce---16682717577.pdf
    • https://artasedanasingaraja.com/uploadfck/file/jufig.pdf
    • http://zajazd-broadway.pl/galeria/file/vipapupu.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbb648b1a5---32810371386.pdf
    • http://ginzaoakland.com/uploads/files/pufusakotalo.pdf
    • https://hotellemaritime.com/hotel/upload/files/jewifa.pdf
    • http://ordineveterinarivenezia.eu/userfiles/files/26805373373.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c5c206900---40726527699.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a52b8a3ec---segupirimujowun.pdf
    • http://cka-shiba.com/ckfinder/userfiles/files/39239270652.pdf
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/modijebin.pdf
    • http://location-appartement-venise.com/italie_documents/files/xutaperukalatuti.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/9njbjniksunioq8cb8neehppuo/kixazew.pdf
    • http://efuegypt.org/userfiles/file/37429130970.pdf
    • http://4grd.com/cmsimages/file/97360478838.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4844a9abb9b179a7e0ebab2dd8dfe54c/rowonaxizogimazinu.pdf
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/99233182141.pdf
    • http://westernmaki.com/uploads/files/7677644072.pdf
    • http://azizolace.cz/images/file/6951372803.pdf
    • http://richwoods1969.com/clients/861079/File/daxenutejekorisivijimi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+draw+human+figures+step-by-step+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_off0000ebdf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDF 16792 bytes
font_01_sfnt_off000103f1.bin
15ae78fb816f5ff8925e92ee4921dd61d730956a76b93fa320ed7b63ce6d701e
pdf-font-stream PDF embedded font (sfnt) at offset 0x103F1 17012 bytes
font_02_sfnt_off00013001.bin
8e34889899ea9bbbffe44d1e089652eb850e7930dfb53d2f53cefe46cef649a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13001 11364 bytes