Malicious PDF — malware analysis report

Static analysis result for SHA-256 e601a29c44db34aa…

MALICIOUS

PDF

92.1 KB Created: 2021-07-04 00:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 13e95eecb18f0d88a5b8a8b042762c50 SHA-1: 6ca511b126cbd5f64fb514f9a32dbc75dfc7e340 SHA-256: e601a29c44db34aa218c61dc10b3a58778514ab2f5fbc281d03077077c72ac69
204 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a social engineering attack. It contains multiple links to potentially compromised websites and uses a 'ClickFix' social engineering lure, instructing the user to press Win+R or paste a command, likely to download and execute a second-stage payload. No scripts were extracted, but the embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://www.adarshvidhyasankul.org/userfilesfile/58170133227.pdf In PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/tagagiguvab.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e10f0932c---76796097454.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/30676031632.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160820f0504044---kizulubajukimekobip.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/jitugozutixezilonuruxare.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/22049948867.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3835fe093a---69966308856.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087816e59cd4---kixuwezepapaveboveju.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/8f781daba2180c6094215bb885a539c1/bonopa.pdfIn PDF document text
    • http://endemic-capital.ru/uploads/files/supukewugunamawerixide.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/sufulekijijokubol.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/beb8e510b6e82edac53ae4e03abc5b1c/59381588143.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/21561846307.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/26398158597.pdfIn PDF document text
    • http://coffee33.ru/archive/file/30979686197.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/02e3f273e8388e2ab0a3f08d41d2e943/vomizala.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/55980133893.pdfIn PDF document text
    • http://tangiahoang.com/skinkorea/Images_upload/files/sijunejujaboluxulezu.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16096b324a683b---11016297545.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/75528069188.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/jubowijuxazasefunumake.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f98a0e9680---zejudoxilukilozakefad.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e14d18ad86---zixegubuluvug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=garry%27s+mod+free+download+multiplayerPDF 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_off0000f423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF423 11032 bytes
SHA-256: 0d6c82f00d848770c2c42f94a959e11a7f120100cd914dffda167981a8c38147
font_01_sfnt_off00010df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF0 29648 bytes
SHA-256: ba942be38d5b85ffad5774f6451a94c17d6ac94146ebb57c4b8ff6a6fae2eacb
font_02_sfnt_off000148ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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