Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9692b28f88566e…

MALICIOUS

PDF

75.1 KB Created: 2021-04-04 16:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ce0dac277272c92cb48c02f3f854717 SHA-1: ba18ad16fc8a97feba97ae3e1f49077491a2babb SHA-256: 3b9692b28f88566ed84407b25d174b53ad8129a5d739c0f92eb5b93d6d6610da
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with a high risk score. It contains an external URI pointing to a suspicious domain, suggesting it's used to distribute or lure users to malicious content. The document body, though heavily obfuscated, contains references to 'Pc bluetooth connection software free', indicating a social engineering lure. The presence of embedded URLs and the overall detection pattern suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/123?utm_term=pc+bluetooth+connection+software+free
    • http://befigter.xyz/18785311068viif5.pdf
    • https://cdn-cms.f-static.net/uploads/4501045/normal_6043e29fe3346.pdf
    • http://gigezojiradof.scienceontheweb.net/jolifomanobosetexabote.pdf
    • https://cdn-cms.f-static.net/uploads/4406228/normal_6037480c315fa.pdf
    • http://trysol.xyz/50304102849ba2l8.pdf
    • http://generatorsale.ru/nuvazewadoponajoturamiwq4na.pdf
    • https://cdn.sqhk.co/mujejadalale/oShO7VA/jizulamagodufenubosumavon.pdf
    • http://sumapewub.getenjoyment.net/fazufel.pdf
    • http://topplafond.xyz/how_to_be_successful_in_distance_learningn326g.pdf
    • https://cdn-cms.f-static.net/uploads/4495399/normal_604cfa005675e.pdf
    • http://zarabatyivat.ru/28889086611ysm6u.pdf
    • https://cdn.sqhk.co/vuwipabobatu/d4jcAjE/hallmark_channel_when_calls_the_heart_season_7.pdf
    • http://abreudesigns.com/java_netbeans_database_tutorialfd3k8.pdf
    • https://cdn.sqhk.co/simikitivo/dfnkueD/grand_alliance_order_army.pdf
    • http://lalashoppen.online/infrastructure_capacity_management_template08sjn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_ba3acec2384247948cda36e2c57acd42.pdf?index=true
    • https://7e079b21-6cfc-4bbc-a8af-001f4930a7f2.filesusr.com/ugd/f66805_ffb1e595f9a74c8c949d826623677a44.pdf?index=true
    • https://692937ca-140d-46b9-9715-018e108c1018.filesusr.com/ugd/2540a5_56c1f751d3af425c8f2eb1a6061a80d0.pdf?index=true
    • http://mobukug.myartsonline.com/3841014809.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbdb.bin
67cd8387e9731b69c9730b2713d03b9986a55f98b99efb4d6b23b6ccd1c1b818		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDB 5084 bytes
font_01_sfnt_off0000ed20.bin
1236f984528afaf7f92db745028474acb63dc925c4d49750d208e0e63daa686c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 10504 bytes
font_02_sfnt_off000110e7.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110E7 4324 bytes

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