Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb36128b19d12aa3…

MALICIOUS

PDF

68.8 KB Created: 2021-02-19 14:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a606bb7339099a8c6518716892666850 SHA-1: d1cf8985e4a8d5270b353903524fb8b5d58617f0 SHA-256: bb36128b19d12aa34f5bd120c498d1cce5e580f2f11749405ad79e89df35d466
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be related to a search query, suggesting a phishing lure.

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://druttle.ru/123?utm_term=how+to+program+cox+remote+to+tv+xr11 PDF link annotation
    • https://cdn.sqhk.co/madagijoj/je8Iio3/20862482023.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/cif1oid/soccer_training_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisoritet/fgfPghr/serial_bluetooth_terminal_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485935/normal_6021d7d8cf6db.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/hjhgvid/beginner_cross_stitch_flowers_easy.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/gcgiSoA/pusuwarobajepuwumitel.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/blljfjc/save_girl_child_essay_in_english_100_words.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383792/normal_5fc64905ae3fa.pdfIn PDF document text
    • https://cdn.sqhk.co/loxexafetivu/eigibgi/country_hits_80s_90s_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483071/normal_602f75b495152.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/ThjfJjg/water_marbling_paint.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/idjiihv/amaze_game_icon.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/dUEaNjc/lanaleje.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/bolovopizonuki/hard_indices_questions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/bhag_milkha_bhag_movie_480p_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/field_guide_to_optical_lithography.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/jorovizulugogemawoponuzux.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_off0000d1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B7 5276 bytes
SHA-256: a6f236409a19c124792fae19d427ebb7cffa3d9fff448fb65832d44988fa029f
font_01_sfnt_off0000e3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B6 10144 bytes
SHA-256: 84909fbabec69a910265058712340f0385c53b262c5abdc9ba82efea80d8c73c

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