Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bfeb2314fa80ebb…

MALICIOUS

PDF

73.0 KB Created: 2021-09-25 14:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6ad74940534e2277340f2bfc71610ab6 SHA-1: d77f43dda3d2f5af48275db66825fb884bf0b5a7 SHA-256: 3bfeb2314fa80ebbaa13bea8100a303da1725ff598334e72e11e92bcdbad93b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various domains, many of which are hosted on compromised CMS platforms. The embedded URLs suggest an attempt to redirect users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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
  • 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 http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161493f8544377---woniwiwibetudux.pdf In PDF document text
    • http://montex.pro/uploads/userfiles/file/27858974406.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/14583076914.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/rovaxudikal.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/618c52ce413c1198e034984ff1e5fad3/sumawopofekodimemirajusiw.pdfIn PDF document text
    • http://gdgom.com/upload/file/2109230748130243881arlydm96rvk.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/53403016641.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/sevenomazisuzefijek.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b7e7f0ff7---57758809241.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/tobaxinafi.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/fe9a4ef9cb63f8763a3c967c9e3fbc1d/38418683191.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/7396309178.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/sexatisupafate.pdfIn PDF document text
    • http://theofficeplus.com/userfiles/file/fofim.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/7fc1c14cc220265fd0bbcf2adccaf37b/51135456895.pdfIn PDF document text
    • https://tigaintan.com/contents/files/98995968094.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090321512133.pdfIn PDF document text
    • http://szm.hu/userfiles/file/gadonafizonit.pdfIn PDF document text
    • https://ghnservizi.com/file/1137293302.pdfIn PDF document text
    • http://cichanski.com/Upload/file/92704968297.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/zorexagiwusalet.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/fogolizun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=coc+hack+ios+2020PDF 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_off0000b526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB526 10212 bytes
SHA-256: 68412a0807aabff6b184bcd877e3f84c069aac39af4b30f1a904d27e6e2c9cd9
font_01_sfnt_off0000cc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3F 19568 bytes
SHA-256: 87d61d8ecebe2e12e186199beb5e29dc65ce14833719909f1612ad162dde83b3
font_02_sfnt_off0000fe7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1