Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d01320f60f5a4f7…

MALICIOUS

PDF

85.9 KB Created: 2021-09-19 14:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a301ab57550690e8a94a30d330671a54 SHA-1: f69b6efc7eaeb8985071dc0a667625da2bceb1f7 SHA-256: 4d01320f60f5a4f7a98ffc2ddeb66586560b5e5520fc32159aae64b4b50b1838
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. Heuristics identified it as a link farm, with several URLs pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://drivetripper.com/userfiles2020/files/58352335397.pdf In PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/69549146822.pdfIn PDF document text
    • http://kelvista.lt/images/files/bosituvemeradimeweluf.pdfIn PDF document text
    • http://zlzljc.com/uploadfile/file///2021090511253296.pdfIn PDF document text
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/27220212935.pdfIn PDF document text
    • http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/8587728128.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/64668681363.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/bemos.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1631239210.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/vetinilovij.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/682f0d36c32800f26ebbd430ca64509b/491402661.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/zujem.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/ragidavopuxutudowi.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/19325690840.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/a3c5169543bbe7b8cde3d846c72430c0/magowusomedewojisuvof.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/zotenedeja.pdfIn PDF document text
    • http://cobmedia.hu/include/35392130739.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/69146824476.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161339f211fd11---43117359139.pdfIn PDF document text
    • https://priscar.com/documents/files/gamekopelaxavuvokivi.pdfIn PDF document text
    • http://dytac.hk/userfiles/35740831996.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/raxorukowopepax.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/28871142115.pdfIn PDF document text
    • https://ezokniga.com/uploads/file/xojidaluwurazukabem.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/17366342427.pdfIn PDF document text
    • http://all4pets.cz/ckfinder/userfiles/files/75064345262.pdfIn PDF document text
    • http://reyazahmad.bscsaoner.in/ckfinder/userfiles/files/91133758530.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=pan%27s+labyrinth+full+movie+english+subtitles+free+downloadPDF 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_off0000e9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FB 11340 bytes
SHA-256: 3a0f6fbb1ff74a00cedacf3177a64deee97c7a0e4391490bdd20eb82c1732927
font_02_sfnt_off00011c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C65 17332 bytes
SHA-256: a58eeb5120d94827d3a80b579977debf87a016e1716f547f674a0637e9cc594a