Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb05e9bfbe7972fe…

MALICIOUS

PDF

79.6 KB Created: 2021-03-12 02:30:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bc0565595dd5c7a061e7e75128e12a76 SHA-1: afe5aa35833e8757aef762a14efd71e23bfabc74 SHA-256: eb05e9bfbe7972fee27be3e1100c671d740778be19db8ef630f1c45e9684e2f9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to suspicious or disposable domains, indicating a phishing or scam attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further supports this, suggesting the PDF is used to generate traffic to these sites. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=pdf+viewer+plus+application PDF link annotation
    • https://cdn.sqhk.co/giganopof/HiagjUB/elifoot_2020_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/gfLia7w/52962616237.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/94978399216.pdfIn PDF document text
    • https://cdn.sqhk.co/jalosemuv/TgfvX5N/zig_zag_ballroom.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/fumarakobudakum.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/verbal_reasoning_test_with_answers_11.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/70086973294.pdfIn PDF document text
    • http://dawezedelofeda.scienceontheweb.net/laars_mascot_ht_330_error_codes.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/11939651623.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/sony_wh-1000xm4_vs_sony_wh-1000xm2_reddit.pdfIn PDF document text
    • http://rujitexoxobag.mypressonline.com/86878503360.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/ljgGOii/65702862413.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/sekoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1cc2b6e-b119-4596-a984-ddd24bea5ebf/12599697816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c653fc0b-606a-45a0-b970-e3ab60992e1e/harbor_breeze_replacement_remote_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e68903f-2c1f-4095-b08a-9e03442c3f75/3030334159.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/6790512640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf3c2bcd-292b-4be3-9203-0c5e90a988d8/62753451442.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/35626734483.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/cdf_statistics_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce8c1e18-9ff7-4ec4-b005-83b1014ee450/music_notes_drawing_tattoo.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
    • 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_off0000e635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE635 5304 bytes
SHA-256: ec07fd88cf5686d61fea611b5dee9027f9df31b2f1441e779c29a2127b1ad120
font_01_sfnt_off0000f867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF867 10368 bytes
SHA-256: 801ec9bf486ce026c8af96a8397db426469f8be373d4cad974db57a8221febb8
font_02_sfnt_off00011c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C25 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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