Malicious PDF — malware analysis report

Static analysis result for SHA-256 497ba63acc32d4f2…

MALICIOUS

PDF

86.3 KB Created: 2021-03-26 10:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0159dd19cf7690e97f3353b38def403c SHA-1: 30ae061f86bd67743257c25cdb478651fbb9cf76 SHA-256: 497ba63acc32d4f244485f5a7aaa2f20d4e5f59f9c56fdb05900e419857df488
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'guide'. No scripts were extracted, but the presence of an external URI strongly indicates a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/wix?keyword=mystcraft+1.12.2+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454682/normal_6042c4ac5a9c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461245/normal_5fea405a93fc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_5fd96565188b4.pdfIn PDF document text
    • http://saudiautoinsurance.com/radorodixapugimqjyeg.pdfIn PDF document text
    • http://stickerrus.ru/xunejinosutecomna.pdfIn PDF document text
    • http://free-at.pro/5_ejemplos_de_estilo_directod3pcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381083/normal_60397924a7672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401982/normal_6042053148424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454670/normal_601f8275c8481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_6015e71add8b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383464/normal_6014a0543066b.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/0f7fe8f5-7f1f-4293-860e-843069c90e3d/listening_skills_exercises_online.pdfIn PDF document text
    • http://zaxalamel.rf.gd/19523087393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44f85c16-9000-4b6b-ba34-01bd5ff4acdc/high_chair_weight_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4d80f98-94ef-4d97-bce9-87312e013721/compact_dvd_player_for_tv.pdfIn PDF document text
    • http://bomofafavadu.rf.gd/86967433041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb09d74-1d9f-4141-a251-c9ef9b2c9611/53217455108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c2de9c8-931c-4630-9b4d-c14817166d93/how_to_reset_danby_dishwasher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c99bf17-ee4e-4a1c-a209-c32ae0f34cf8/8469040134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ffad800-f2d4-401c-b804-a9f02d2aa1b4/blessed_be_your_name_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60eee5fe-5aa5-47b2-b02e-387253a5899d/velagegivazeliguzurami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dda5dc9-d358-486e-b3c0-ba595a9b07d3/947857417.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_off0000fe1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1F 5480 bytes
SHA-256: eb453f4a753d142365b2ee1542fd2d7482b8e68887cfeca7835a7cfa590b74c0
font_01_sfnt_off000110f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F8 10652 bytes
SHA-256: f88cff32fef06987d923b0bf198b6accc0bd2db7ecd2b35b0c1dd5b6385841d1
font_02_sfnt_off00013594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13594 16064 bytes
SHA-256: 8ce0575abc6f686af3c1393089841c21814f5c4838d5adbe0d649219e58da802

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