Malicious PDF — malware analysis report

Static analysis result for SHA-256 8078a4894906896d…

MALICIOUS

PDF

118.6 KB Created: 2021-07-19 11:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d98c63cd96bd945e7ed30f5b82355516 SHA-1: 3e655581b163ee61f59bc5d8d87593a2b6841418 SHA-256: 8078a4894906896db53ec0b05ce680e378bd05b0e415e1bd9e746f7991bd8feb
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is a link farm pointing to compromised CMS uploads and disposable hosting, consistent with a payment redirection lure. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/julelozisajo.pdf
    • http://freetourscadiz.com//ckfinder/userfiles/files/jiriratazezevibukox.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8ce347847---9658955044.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/aes15m2r9739jvi1m2l68fhh23/43623538249.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/0eb6a36985c9cd0742cc60e057a05acd/1060730064.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/11bfe889ad23fd9113f59083ed5a55c9/99931117905.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/40eb38d86a0fea4647cff8db1fa50489/6763507785.pdf
    • https://imagebeaute.fr/userfiles/file/47303670938.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/93d10501ab8ba7c74c1a20b393087c5d/bufotafipares.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/4f8122c69ef37bb599702f95d8924a3d/mixikesibirazajiv.pdf
    • https://santevita-bg.com/ckfinder/userfiles/files/lepapibapovipovugunudixa.pdf
    • http://alarcon-v.com/editor_upload_image/file/vopuvikawemomupukuzexe.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e01c3729e---wigipipifogapixadifukuza.pdf
    • https://unosms.us/userfiles/file/80042337984.pdf
    • https://cottonweb.net/userfiles/file/4917249210.pdf
    • http://nova-auto.com/upload/kapalovebibaz.pdf
    • http://cabin4kids.org/clients/0/05/050cd0fff5f75fdfd14851583cc0de74/File/kekexekizapupudibewupu.pdf
    • http://www.aadhar-interior.com/userfiles/file/82211651762.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e28c19ea54---67989649106.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-6-6/20210606065735956486.pdf
    • http://dalboncostruzioni.it/userfiles/files/85473611879.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/a90c62ce5ed7882c8b611e52d7f5d6ba/dinurawabosagozejerix.pdf
    • http://fabiocaronearchitetto.com/userfiles/files/37089828044.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098499b203cc---24995222747.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=personal+financial+literacy+homework+1+answers
    • 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_off00016c69.bin
13131267295c3a982cfa89a0215dcdcbe386e890f7070e7b3cbfb52213e80ec5
pdf-font-stream PDF embedded font (sfnt) at offset 0x16C69 18004 bytes
font_01_sfnt_off00019b6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x19B6A 16792 bytes
font_02_sfnt_off0001b381.bin
fb14b44f300914ce03052926bc8040a4689cdcce609426b0f9713b1b88f5b9e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B381 10948 bytes