Malicious PDF — malware analysis report

Static analysis result for SHA-256 6642726f156b50dc…

MALICIOUS

PDF

75.1 KB Created: 2021-09-20 00:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f3fbc5c8a1f40f1e75f88298597123a SHA-1: 73451ef68ef71f29b825a129b6b109b8ac8cc3dd SHA-256: 6642726f156b50dc89a172235eda5b3bd2b6b9ac759b602acc9e5f111e860d6c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting. The ClamAV heuristic identifies it as a phishing trojan. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.2126

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.
  • 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
  • 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://drafthe.ru/uplcv?utm_term=moms+day+porn
    • https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/pazuduruviwatix.pdf
    • http://www.ap-arte.ro/fckupload/file/43347519663.pdf
    • https://muzpony.de/obrazki/file/xofisalubojewosazomu.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/0e95f38e61a4f7e50ef357327e2137ab/19212106707.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/2cbf393535ba00b3fc7c4443fa2bebf9/mezogakile.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b71275e36b---29641148056.pdf
    • https://tainandentist.com/uploads/files/202109111910485834.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/6498c6da9781540e81c436ce3564ee81/86412095782.pdf
    • http://goldcoil.com/uploadfiles/files/936875455.pdf
    • http://klubbelgickychobrov.sk/editor_uploads/files/6313592410.pdf
    • https://radiosmile.hu/upload/file/11033241457.pdf
    • https://sukaunited4d.vip/contents/files/wunitezaweweseme.pdf
    • https://doina.md/fckeditorfiles/file/28698498008.pdf
    • http://rimini-portal.de/bilderarchiv/file/81593787545.pdf
    • https://bokaichenyu.com/upload/files/keserokirukokeda.pdf
    • https://myreply.mobi/snappshott/editor//file/riluzovikuvenoruf.pdf
    • https://gryf-wet.pl/ckfinder/userfiles/files/fowazupixenu.pdf
    • https://educationindiajournal.org/ckfinder/userfiles/files/vunorurozojivi.pdf
    • http://nocleginaplus.pl/uploads/userfiles/files/zabopitewewexilodavulos.pdf
    • http://sarica.com.tr/ckfinder/userfiles/files/39031729842.pdf
    • http://djapm.com/userfiles/file/69774603647.pdf
    • http://location-appartement-venise.com/italie_documents/files/14502515422.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341a703e236---13641664955.pdf
    • http://newgrids.com/userfiles/file/mosikokuwajolazogis.pdf
    • https://www.edm-medical.net/ckfinder/userfiles/files/gagurinapepuxupe.pdf
    • http://happysmilecard.com/uploads/files/wazulijitigijufajexa.pdf
    • http://resheto.ru/users_images/fck/file/38828870991.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbbc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBC 16792 bytes
font_01_sfnt_off0000f3d3.bin
377255a65f7e59ada75d615b061b482a14aa125c01bc36d364d74085e6c4b9bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D3 10292 bytes