Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b207496c7190e8…

MALICIOUS

PDF

79.5 KB Created: 2021-08-04 23:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 23f5007ca6c29bb25687edc8bcffe56f SHA-1: 96baa69fe36c7d8f7da9f99bfab408dd5b9c4b79 SHA-256: d7b207496c7190e8afcdaeb66116bba79492dea8f66cf68b3871515b5aa10bd8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for Pdf.Phishing.Trojan. The document acts as a link farm, directing users to numerous external URLs hosted on potentially compromised or disposable domains. The presence of a 'Password-protected archive handoff' heuristic suggests a multi-stage attack where the PDF might be a lure to obtain a password for a separate malicious archive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://allytemp.ru/uplcv?utm_term=goblin+cap%C3%ADtulo+1+espa%C3%B1ol+latino+descargar PDF link annotation
    • http://nanyangtextile.com/userfiles/file/27915267370.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/dunetuninit.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e47d0cf23---36585317958.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/28394616593.pdfIn PDF document text
    • http://nhadephoanhao.vn/upload/ckupload/files/92542234156.pdfIn PDF document text
    • https://trsoftyazilim.com/genelresimler/file/42394537927.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/6c07c537cac6bf870602c363ae3b0864/mikuralegupepevozogepit.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16073fd6de9410---papot.pdfIn PDF document text
    • http://rltclassof1970.com/clients/8/8f/8ff9f19c840b982a6efda18ba8bb483c/File/mebumakatedo.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/692elmmiqqrhrblr5obecji923/fanivitewedez.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/cee2df2d4709b68887b51673cb050a35/miwijejamopipokabi.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/64065149070.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/46b2bc20f71abc16fa0ead0fcdf357a4/dozoxade.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/g2h354538tgoeu9tga5p2u4570/garibufamutifofi.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/nubifi.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/rofugepemisizu.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c88969289e---wotexeb.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210715_235925.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bedc1134c---seruxu.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/53838518174.pdfIn PDF document text
    • http://bscartridge.com/pic/8983110839.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/budetipagusegomuxotoxawi.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/resekaraxavetuzun.pdfIn PDF document text
    • http://timecraftz.com/userfiles/file/lukimobaxide.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/mitabogov.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210528_9323B7B19A5C544D.pdfIn PDF document text
    • 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_off0000ce3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE651 11288 bytes
SHA-256: 9dbf6709c214b9b797a120b7eb9e46f796529f196604c6028a316e8f2ee2ab75
font_02_sfnt_off00010046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 17816 bytes
SHA-256: 858dbc3e572c1762c56c2c2b6002d25f9b9df039def468a646778221020fd5b1