Malicious PDF — malware analysis report

Static analysis result for SHA-256 2572503bf67ce8d9…

MALICIOUS

PDF

85.9 KB Created: 2021-09-19 05:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7d785ea1702d9fb9237695b854b4313f SHA-1: 849bf026de403bdf5cdcf2d93d71105133f687d3 SHA-256: 2572503bf67ce8d9b2c98584987310e3c32509a4b0d3a858c9ed9f36feee43ef
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The 'SE_CALLBACK_LURE' heuristic indicates it's designed to trick users into calling a phone number, a common social engineering tactic. While no scripts were extracted, the presence of numerous links to potentially compromised or disposable hosting sites suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dcmheavyequipment.com/admin/images/file/fenufuwepuxosu.pdf In PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/butejukalawo.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1a4b614e4---bosevaza.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/nepuzemukurovelimobamojo.pdfIn PDF document text
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/57798235992.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/kivunugu.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/zexum.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/zibexixidobilu.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/tuzejazorifud.pdfIn PDF document text
    • https://dampinggame.com/calisma2/files/uploads/71281551893.pdfIn PDF document text
    • http://qualityfirstservices.pro/testingsites/advantage_aviation/assets/media/file/32109155670.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/n5dc18gc9jr62oq52oqooug09m/rawemotafasawerabo.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/difokafirasoked.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/72078553291.pdfIn PDF document text
    • http://dasbluemchen.com/tikipebewidejugebumuzova.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161441e53ac34d---40958620549.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///wavolone.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9a3b33337---27144471951.pdfIn PDF document text
    • http://hkalc.com/userfiles/56315114212.pdfIn PDF document text
    • http://reylab.com/userfiles/file/53275626668.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/maperekebabokujedejebika.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/9f1a63d9cf92830e748468bf33eaba82/kovusu.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/mexadapimomamu.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210904110017.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=tvzon+channel+listPDF 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_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 10316 bytes
SHA-256: 23c8f893aa0a607963081943d7a47778a229c7680b9dd9441c51ca4aa45c15a3
font_01_sfnt_off000102cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CC 18568 bytes
SHA-256: 5356787689f48b53ee1bc1933dbfa65e1d5087112fb968e2819829f1e8dd5d64
font_02_sfnt_off00013225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13225 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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