Malicious PDF — malware analysis report

Static analysis result for SHA-256 c25a692754228958…

MALICIOUS

PDF

70.7 KB Created: 2021-09-27 08:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 40abb20d33b94a797ef27442fa86713f SHA-1: 8a9b62eda6523de61402a7df1fbcf216bf5ed796 SHA-256: c25a692754228958237e315df97ada03b9ec6c9cf21796aec3d20ea99bf01e4a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Application Data

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or credential harvesting attempt. The 'SE_MFA_LURE' heuristic suggests the document is designed to trick users into approving multi-factor authentication requests or providing one-time codes. The embedded URLs point to various hosting locations, some of which appear to be compromised CMS uploads, further supporting the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://cathita.vn/upload/files/gakevufiminapovi.pdf In PDF document text
    • http://konemara.hu/userfiles/file/45955449463.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/puwozik.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1614d7a2aa8741---pawiribaxetomokozufogavup.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/mozudaxevulotivakavonupop.pdfIn PDF document text
    • http://builderall.info/userfiles/file/51226472108.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/90983794954.pdfIn PDF document text
    • http://papierplus.pl/userfiles/file/1082238251.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/64774214623.pdfIn PDF document text
    • http://mosme.org/uploadfile/files/sidoj.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kotoripavojubos.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/jabirotiritafaxox.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/89200330234.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/95592702383.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/duwug.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/26989468118.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/87088844268.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/97594416192.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210919_94596F5AB0CECCBB.pdfIn PDF document text
    • http://bige.vn/uploads/userfiles/file/18707339966.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1614ceeef2267f---4380511914.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/0dn82928b3sq85l7ab5k03ut3i/65437737267.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614dadc89bfc8---maxidulus.pdfIn PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/wuwolatowiragugodaruwi.pdfIn PDF document text
    • http://xn--b1agpbmdtf.xn--p1ai/upload/file/47267275954.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=coin+master+hack+without+verification+2021PDF 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_off0000b3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD2 11224 bytes
SHA-256: df9e03cb62e23c75a428e44784ce597b83504d2bafd1058b464b651259ef19fc
font_02_sfnt_off0000e622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE622 15124 bytes
SHA-256: a87c2e2594e5ad71121d43c2ce70949aa685556d950942c628ada2747cfbcf57

Open this report in the interactive analyzer, or submit your own file for analysis.