Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb52c4637ea9b1a…

MALICIOUS

PDF

96.9 KB Created: 2021-07-05 02:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3c2ffb09ef26a82052c3d06279298315 SHA-1: ccc25e9d42ef03b9a8ec46d975ee3906e6fa4e9e SHA-256: 2eb52c4637ea9b1a5ae7370d18e4a20a5f5fe76fa66401dd5700f4ae2e7f6cb7
224 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains a lure requesting recovery secrets or private keys, and hosts numerous links to potentially compromised WordPress sites, suggesting an attempt to trick users into downloading further malicious content. No scripts were extracted, but the overall structure and heuristics point to a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/3123c0fdeec4c67107afb5867a6aa360/86369897139.pdf In PDF document text
    • http://czdashan.cn/uploadfile/file/2021050416582973499.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c3692b66d6f---41590983437.pdfIn PDF document text
    • http://infunplastic.com/d/files/dadejebivujafijugomubebi.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/f9258c021100485c3f6abff6a17ceb62/8109173370.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/6c42c5b6244f02c54bd2313a6cdc79e8/filanopafokasedatum.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/36a8e7e1f1b8ee5d4a5bce54ce292d08/wuruxukakurimuruz.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c62ba1c461f---98309528233.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/vijivijevokidekodezuvopuw.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/88925531547.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/dc6daedd052461335ad8f6162b7ec7c6/fuzepibanofa.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/155c3b5e3b1d9ec4a2032d235664ab6a/36572211383.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099b4264c4f1---46072996969.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/9b42e10dcdc7c7078b71300d54baca28/detubebex.pdfIn PDF document text
    • http://suseefinance.com/userfiles/file/98465419966.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ipmgi7vivmb5acpm5qkqn3jaig/38593589256.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/bd53ef49b0d46bc5a3b42688ba7783ed/pajovesijomapupevoraxop.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/fjbea4m34qls1kpcc8oru6c8hj/vowavagif.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c950568cf90---1171664903.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/820dbc0cdc8a3db585fd5284d98837ea/32799461257.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b74892915f5---kosenojizuzumu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076906ef31b6---dibepusojotena.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=enable+ftp+over+tlsPDF 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
    • https://filezilla-project.org/download.php?type=serverIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 17672 bytes
SHA-256: ea14476790a4042f8303be34c5bf5e55b3acc8b95917571c2a3b555e950a5149
font_01_sfnt_off00012163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12163 10448 bytes
SHA-256: 35eb2a767181f64861fe8e8e6d78831d989777aa306e54dfddb5cd097a45e4de
font_02_sfnt_off00013912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13912 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15120 11456 bytes
SHA-256: f638a344df78d1c6bf16130e84dbdf516edd6c96cb7c8a23dae67df87fdaa47a

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