Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf12205d91b16dca…

MALICIOUS

PDF

88.0 KB Created: 2021-06-26 15:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84d8b2652ac6f300cb10e4c9c092ef55 SHA-1: 179406e35e058c67119a85d379bfd199d600f8b5 SHA-256: cf12205d91b16dca956ca60ef8a34744c99169a6e1e2a3f5e230d754fc79af45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://cgeminfos.ma/upload/file/36654580034.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607c49dc05be8---rujunaminikotuxo.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608345c8c7ec3---4740237031.pdf
    • https://atl-50.com/files/file/nojupolutasozamexudilufim.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/8d8deca259c87c0874b1b87ce24bf405/taferuvagalikepevi.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960f8963dcf---favexadajenonux.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607e20a332f75---fabexezapab.pdf
    • https://red-adlay.com/upload/files/90814014331.pdf
    • http://buddhavehicle.com/userfiles/file/87148500676.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df2880bc74---51890648805.pdf
    • https://atasuorganiktarim.com/upload/ckfinder/files/41898272456.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/l28reuj064utrl4fk5vid79lv0/16631054588.pdf
    • http://7166867.ru/ckfinder/userfiles/files/510664343.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/3s04oq6d92f5m6qm52qa1chdu6/junuxaziz.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b27863a556---55410992468.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b062c9bb7---viwirejotokuvujuxakowilo.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/dej3cogpdkhpsgddd45ihn2ik3/3330897811.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/40c8c7281a9d8c3ea878b30da952fa3c/jipapenekijo.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d9612ca8b---49696837522.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/boll51nbbg1pgukcpdbt9o5946/81936722273.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ec07cbb35---58838568850.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abd29f2d8b---sunajokevapun.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2b2d2783f4---40427067001.pdf
    • http://firewheels.pe/userfiles/file/22830852081.pdf
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/tch1i6br96k2sosfi59q05bbi8/fafadopijuvesasixenilit.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=miitopia+android+download
    • 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_off0000f8c6.bin
6772a34c65f43a1975aa9481de578ffbe5c042c22c634782e020814765f96aac
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C6 10164 bytes
font_01_sfnt_off00010f9d.bin
d4c36228bb1b55a25cbff69314f0ced6d1be4e1d04d611ede40747ee07e76a4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9D 16580 bytes
font_02_sfnt_off00013a96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A96 16792 bytes