Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7ec566b0436f40…

MALICIOUS

PDF

78.5 KB Created: 2021-09-12 01:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2247f1cf3763cf7c48a19c15f8e8a0ef SHA-1: 40fc84f9d604b11f159098421a290ef3707bae92 SHA-256: 0d7ec566b0436f401798ba654ff199d40ccf3479c95099c5ece379ce4a6af829
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further malicious activity. The ClamAV detection and ML classifier strongly suggest malicious intent, consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.paseppe.gr/ckfinder/userfiles/files/rijatoboparavemesosedox.pdf In PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/9ad3e5dbd2d61235c7071fc3c52e4410/fotif.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/jebifixolosepikuzedazorax.pdfIn PDF document text
    • https://www.htlexpress.com/ckfinder/userfiles/files/muniti.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/603b785036a27a32acf5b7fd16594f18/94374097021.pdfIn PDF document text
    • https://urbanshapes.in/userfiles/file/19044309805.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/rudazuxiga.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138367e941c1---10796049005.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/85450309920.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137babe5707f---97764895599.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/kisemafu.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/pamifigonojebaporinuwizu.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/wekivixujazononemeduvi.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/17106867993.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/xuvuwojadazenalibo.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/20574953328.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/giwutowipagoxemide.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/3981307215.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/pilebebavumapanoxijumo.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/telonotimufirijib.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/fanisaxel.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133aa0d9a560---gazilinejaxu.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/jimilugefef.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/biwekijivukijugolam.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/78222550738.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=vivavideo+pro+apk+crackedPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8F 18004 bytes
SHA-256: 4013a10fce1caa06ed07cfe1517811c2c4f151fc6dd98ab43e9dc680242757fc
font_01_sfnt_off0000fccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E3 10216 bytes
SHA-256: 287c099dcc16aa31c49e991722c8d2cd24ecb28466ef5a97395ccfa52839bf89

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