Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b446a4105469f9c…

MALICIOUS

PDF

70.3 KB Created: 2021-03-30 10:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 043005aa113ffa02d55b2f4b97b8bfe8 SHA-1: e8f309845f08186497e9557c9eaf180fd522d762 SHA-256: 5b446a4105469f9ca11cdb504cb38d7bcaaab454406eabf253d408f1ee9bf9b3
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL that directs users to a suspicious domain, likely to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains references to academic materials, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/123?utm_term=uitm+past+year+answer+scheme
    • http://potawuzaj.medianewsonline.com/43796988516.pdf
    • https://static.s123-cdn-static.com/uploads/4413866/normal_5ffd706d12b81.pdf
    • http://sunazeremitiwu.mypressonline.com/vovexegomip.pdf
    • https://cdn-cms.f-static.net/uploads/4423189/normal_6055bac199b3c.pdf
    • http://xufededubumavif.scienceontheweb.net/25414754410.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kudufigunabi/medical_surgical_nursing_gnm_2nd_year_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/dfc41c45-3ac3-447f-88cb-547a999b4eca/38576092665.pdf
    • https://uploads.strikinglycdn.com/files/f62b70d6-ac14-4d43-8a8b-fe90c58525f8/wisdom_for_mothers_book.pdf
    • https://uploads.strikinglycdn.com/files/f4117c42-b107-4b59-946d-fa9f97193bdd/2001_kawasaki_prairie_400_4x4_rear_differential.pdf
    • https://s3.amazonaws.com/ravuxudibure/dugunukuka.pdf
    • https://s3.amazonaws.com/dalava/49325155085.pdf
    • https://s3.amazonaws.com/wupiwupiwot/formatting_sql_code_online.pdf
    • https://uploads.strikinglycdn.com/files/2c76ebb1-8c2a-4586-acc0-d5a794aefe78/how_to_pair_bluetooth_remote.pdf
    • https://uploads.strikinglycdn.com/files/91c15976-7bba-4460-92f4-3f99ebe97850/magic_bullet_blender_large_cup.pdf
    • http://vakizonozajaxe.onlinewebshop.net/achondroplasia_growth_chart.pdf
    • https://s3.amazonaws.com/mulerux/98717205120.pdf
    • https://s3.amazonaws.com/donukadizolin/3rd_grade_math_spiral_review_worksheets.pdf
    • https://s3.amazonaws.com/zetubakuz/51923950870.pdf
    • https://s3.amazonaws.com/jipowumat/copenhagen_card_city_guide_app.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_off0000ccf6.bin
cc0f98ba57fe256b33a2316005ffaa98fbd99cb032fb2885427ea1236117e1c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF6 2080 bytes
font_01_sfnt_off0000d685.bin
7a20d9558f89c18fbd4152826a393300c2f2cafe0a27881a0bc2ff7ca6b55166		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD685 5324 bytes
font_02_sfnt_off0000e88c.bin
809bce8f35ed37f2177bf650093c00fac0b97c9d027632e0a893a95fa0fdc906		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 10316 bytes

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