Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acefa06c62d32b4…

MALICIOUS

PDF

102.5 KB Created: 2021-07-06 00:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39357ece3a18c6f2d373f5bb7e842f12 SHA-1: c4b6b837d4b8a436ee6e917019afe36d21523b06 SHA-256: 0acefa06c62d32b45f5e06b7f53d2cb856325f6e70fefbae3d6a0e9109f7c97d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to external malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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://ankaser.com/userfiles/file/tajakuzusawazixamido.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfbb84bb95---40350652549.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a121befe2---pigujinabet.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8ccf3589f---dimovetaxo.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/04b6c806fdbda72e336180933e3806ea/81242723198.pdf
    • http://nusratali.com/userfiles/files/pusezetipenofiruwatan.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9c38519ec---31577830002.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c037d61a---kaneruveluvafuzodel.pdf
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/ce5920036c169d0a86edeffe0be3b824/lonemofanedofo.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/jgihdadiplukkl23chm8ptj4g1/71031625365.pdf
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/83576849714.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/5da0f18adc723937d69b96abf1e27b96/bakabepativixa.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609896e98e244---pajebakerolog.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4000a70ba5---jivolovanisop.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/f371628f486d55dd247b0a0337e26626/tiwuraxojewatul.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/47c7d2efb5095df7029eb335ec041189/44918436803.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d0a9559792888593049324a8f00cf678/muzazi.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4920799783---gimexepezomud.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/6e77f6f5b1d874b541092502157e80b4/bupukosofefapumaramepuve.pdf
    • http://cokhihoangvinh.com/uploads/userfiles/file/39851151559.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f3486d5fe3cdad8c60b88bb8eb25bf0e/jilefofopiwexobivebik.pdf
    • http://syuncyoku.jp/upload/file/titeziv.pdf
    • https://sanruouvang.net/images/uploaded/file/4052883839.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083a989865b1---46784095032.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/bce144f7b7cfa2fb351e4e83a21e5e86/82597042084.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=meaning+of+wisher
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010dbc.bin
a52d42980f0cc1ce21630c69220073404a5cf22a4630ecacaaa8b31c0075661d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10DBC 28452 bytes
font_00_sfnt_off0000f5ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AB 16792 bytes
font_02_sfnt_off000141d7.bin
a92b60d6900849a27520810e92e0ce07a1f203aec1e245b4a2968a0c8ff23b5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141D7 10428 bytes
font_03_sfnt_off00015977.bin
fafb4f6d49f294078cf8641ab444f3712a4c1e98710f4e5a506369b4946c0c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15977 18560 bytes

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