Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb8fab1e35d6d61c…

MALICIOUS

PDF

83.0 KB Created: 2021-01-19 16:22:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: caccb0c7903d06509df910e30b3c51f7 SHA-1: d4f8170964031613d421990be377ad70f1860a25 SHA-256: eb8fab1e35d6d61cda42364951f1f449aff8b4c4620810a279606992bd9a2ca6
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'trafffi.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, but no clear textual lure.

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://trafffi.ru/123?utm_term=after+read+online+anna+todd PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453560/normal_5fcd361a16e67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374851/normal_5fd0821f53dd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370737/normal_5ff05e7c092f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f94feb21b46c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496616/normal_5fd273f5cea90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393026/normal_5fd26e6c9bada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466146/normal_5fd660054b684.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465000/normal_5ff6a1d8c0f90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445889/normal_5f9d9167645fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/aqeedah_wasitiyyah_in_english.pdfIn PDF document text
    • http://zezazemana.epizy.com/best_cryptocurrency_trading_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/86282252943.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/cece_winans_throne_room_album.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/5796588131.pdfIn PDF document text
    • http://fegarezitima.rf.gd/great_stellated_dodecahedron_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/popakep.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/ejercicios_aumentativos_y_diminutivos_3_primaria.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/70282760626.pdfIn PDF document text
    • http://wodasakuzetu.rf.gd/28907102835.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/sujor.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_off000108b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B6 4712 bytes
SHA-256: 8a0e9d21ecac7591e604217d6ff452165ecdcd410771a27009529874b731a2d5
font_01_sfnt_off000118cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CF 11008 bytes
SHA-256: 5b6846de4b84d6328cfd312c774a50967dfa2751707ed5a89b43a2d964194518

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