Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba411202d0ba6c56…

MALICIOUS

PDF

315.3 KB Created: 2021-08-13 14:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 30dc388744d30d129d027f9de230ad67 SHA-1: 19edfccc481f02d1fdb2a8edcba1946a685d00c9 SHA-256: ba411202d0ba6c56dff177dd9aa9098af11633a588a1272d0f9f33432a6b9416
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or other unknown domains, suggesting an attempt to redirect users to malicious content. The PDF structure itself is also suspicious, with duplicate object bodies, indicating potential obfuscation or malformation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8438

Heuristics 5

  • 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.
  • 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 https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755a4fa8d38---33986484639.pdf In PDF document text
    • https://aduanaldelvalle.mx/userfiles/file/niwegova.pdfIn PDF document text
    • http://lindendirect.com/tempimg/file/37976276007.pdfIn PDF document text
    • http://hongdacable.com/d/files/ratitol.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/82483214857.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/42286861912.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/f95cf06a39654445640d7d28cdee8540/39566672295.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160784410f2894---88382511563.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/921a2775fdc2fb7bdb49bcbf3b674bfa/kolegevevunilumotafox.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/4m6geauaue49m2a4q5ksjl7v11/59467827164.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/tadarilojufagakejanojugi.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/21151120769.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/59718851076.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/58715648aa06df77c50688866e6eb5be/23842767786.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/gemiberejupirixute.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/lco8qk1h7nt7f37h2t12vpsvk0/sifuzupikuwilo.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/kewafazozulodabigonor.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/4fd264bf151c1be592f267d3e85ad009/pijopuriladi.pdfIn PDF document text
    • https://spacio.hk/attachment/file/kegabuvifojakilo.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/0ac1fd19cb769aee9747876a12679393/19695117674.pdfIn PDF document text
    • http://feast.to/upd_file/pazuxoxolukimabuwipanawu.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/88673a0778aaf932e15d6cf3528fdcf8/genubokit.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/534fvov3m22esc1simol1rcla0/13342041818.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=dise%C3%B1o+en+ingenieria+mecanica+shigley+9+edicion+pdf+solucionarioPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off00047f67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F67 22240 bytes
SHA-256: 2a11a69064adfd38d19c8d92a9e82fd656eba2551245f0d8521be1d032b905d3
font_00_sfnt_off00042731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42731 47764 bytes
SHA-256: 82b0895671a1d5dd6626154d6f69465c8b64a80ce37befee84c31135a55a9f37
font_02_sfnt_off0004a724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A724 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0004bf3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF3B 11560 bytes
SHA-256: 65f9b011badf500fb7c30596fe178b471a61dbd41bfc14cbd0f27e428341a903

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