Malicious PDF — malware analysis report

Static analysis result for SHA-256 590c8743c46da05f…

MALICIOUS

PDF

86.5 KB Created: 2021-03-02 20:16:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3125da3cfbf1c205e0ec0272a2732e3f SHA-1: de36cb2fd7d9a24717ff3385ceb484e3308166d6 SHA-256: 590c8743c46da05f4188416a3b45a4e688e8cd15502513340adaa1e2846d7c7f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that is likely used for malicious redirection or hosting. The PDF's structure and embedded content suggest it's designed to deceive users into clicking malicious links, aligning with phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/123?utm_term=resumen+chicas+de+alambre+rincon+del+vago PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403413/normal_5fca6d2dcd0ee.pdfIn PDF document text
    • http://losiruwu.66ghz.com/jarurukozitudekoj.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/1RiaePw/ikea_kitchen_cabinets_planner_usa.pdfIn PDF document text
    • http://nanupigib.22web.org/b._sc._nursing_form_2018_rajasthan.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/eCe4hba/nitufolaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_5fd6452abe5b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417220/normal_5fd7f5ac82291.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/gjbgfib/nudexiti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390661/normal_5febeacfd4752.pdfIn PDF document text
    • http://hookup154.fun/kaluzavikegaxunotevmlsxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444856/normal_600aa622960d9.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/hbrnOh0/nipodow.pdfIn PDF document text
    • http://zowedikeseku.iblogger.org/97631922157.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bekawaxag.rf.gd/8136461500.pdfIn PDF document text
    • http://zapavuvezozetet.epizy.com/tibesukanolazod.pdfIn PDF document text
    • http://nesaketesimifu.rf.gd/didag.pdfIn PDF document text
    • http://gozipoxux.rf.gd/guided_reading_activity_1-_3_answer_key.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBE 5560 bytes
SHA-256: 1ea9f5541e3cbfcc145b6b526900aa465bc4ae6d4c846b401a7de25b8b62b401
font_01_sfnt_off00012283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12283 12336 bytes
SHA-256: 262852ce7aabb2520a87f51b210e118abd8f0a8c81451f42afff31cbe0e14b92

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