Malicious PDF — malware analysis report

Static analysis result for SHA-256 effc9ffeedbaaa3b…

MALICIOUS

PDF

76.8 KB Created: 2021-09-12 18:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 8eea651a8371af3f2e0e82955c61d61d SHA-1: ab8641eac0ac18cfe6ac895feadb7896c8ca4214 SHA-256: effc9ffeedbaaa3b49ff06867a65ba8aa2faefb3ed177256b8cc7481de4147d7
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://listocrm.com/userfiles/files/lavipofirojufadiregazep.pdf In PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/5459722501.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/46269203565.pdfIn PDF document text
    • https://tainandentist.com/uploads/files/202109081831353149.pdfIn PDF document text
    • http://solo-reisen.com/media/images/file/45974788784.pdfIn PDF document text
    • http://protezas.lt/i/File/70916450787.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/12605577055.pdfIn PDF document text
    • http://runnersavezzano.it/public/userfiles/file/lebonetuf.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/nexawulojo.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/jamoxojapupimupenu.pdfIn PDF document text
    • http://marine-inox.com/i/File/50544755603.pdfIn PDF document text
    • http://pasted-radio.de/web/files/22708122331.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/21329534447.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/kesapuvag.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/31710202736.pdfIn PDF document text
    • http://yongchengtech.com/uploads/files/202109011107479537.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/vidororufufupaf.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/vifapuwa.pdfIn PDF document text
    • https://attack.lt/images/files/38138194722.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/15946190592.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/154239658161315cbf49299.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/84095158303.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/62233885352.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/2556715856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=e+sisulka+app+download+for+pcPDF 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_off0000c91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91F 16876 bytes
SHA-256: b2a54a81af021ac4994a5a493cf5b9d46bc52f8ed4e17b95f271874677155524
font_01_sfnt_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D05 10644 bytes
SHA-256: b8e5e3d8daf22128b99914d967f8528da82b3579d4e29a223fc62e5b761e11a7

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