Malicious PDF — malware analysis report

Static analysis result for SHA-256 6063857f503f7bd1…

MALICIOUS

PDF

72.1 KB Created: 2021-09-02 21:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fd4e3682d7beccafe122bab8d2116242 SHA-1: d7363b5dd7daccb479bf8d68984941549af393f3 SHA-256: 6063857f503f7bd1274d94a73767348e51698bb285dd50a8afa41fb4ee16266a
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 contains a link farm pointing to numerous URLs, many hosted on compromised CMS uploads, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms strongly suggests an intent to lead users to potentially harmful websites.

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 https://beauty-full.ru/uploads/files/degajajijelu.pdf In PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16247010784642.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/fesipotos.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/dee553efb59bb5e4544522665448f0f3/zawimiwafek.pdfIn PDF document text
    • https://joinvita.com/neu/userfiles/file/76595234876.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921fdab459c---53167263217.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/54439166023.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/rq0it4185nv81m2b8tp5dk0vf0/nodazi.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/29222141655.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/ede66b317d306686454c5a1f1b44bef6/xikowaxikalolowikitexi.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/dezokenisabig.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad872791474---zufonupofasufikotufupi.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/72667899375.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210722_11A669E8AC70E44B.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb8ca86087---31143218720.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/93609436921.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082cdb883bfe---wogijunebajekoxu.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/dda845c00194ad6be2e9f51fd116a3c3/nukaf.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/63178341362.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/64081956235.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/91140952690.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/rubofugolalovalatosid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=ibps+clerk+2019+books+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB750 16592 bytes
SHA-256: 8f29de8d5ef9861b9371c113518e5e882cf54ee63b012f273df41188275dff43
font_01_sfnt_off0000e241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA58 10804 bytes
SHA-256: 48b730760201c592f0a46357837cd3e6cf123fb82bf2a10f354547959bc6a6d0

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