Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab886376590f5491…

MALICIOUS

PDF

73.2 KB Created: 2021-02-25 19:14:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1d7500a755e04ce05369b3d70f08fd67 SHA-1: 5be96032a82dd8d6f7575bf6009e1dbe65ce939e SHA-256: ab886376590f5491ddac25e455b427a67366f5dbe68bf998e1f8e7246c6c48b5
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, 'druttle.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, appears to contain text related to the URL, suggesting a social engineering 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://druttle.ru/strik?utm_term=does+lara+jean+end+up+with+john+in+the+books PDF link annotation
    • http://vobefoli.iblogger.org/ti_nspire_cx_ii_t_cas_occasion.pdfIn PDF document text
    • http://reabook.online/bifilisekidakifoyhtj3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gokefiz.epizy.com/50651954865.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/adnan_sami_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/bitmap_image_editor_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/77962924243.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/emulator_gba_apk.pdfIn PDF document text
    • http://sotaturorud.epizy.com/4_kinds_of_sentences_worksheet.pdfIn PDF document text
    • http://luturuwuxas.epizy.com/teredejasemetini.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/battlefield_3_serial_key_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/mundo_da_informatica_barreiras.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/13628698476.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/the_chemistry_brand_glow_oil_100ml.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/jeril.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/51875037066.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/new_year_shayari_image_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/free_bot_binary_2018.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_off0000e08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08A 5416 bytes
SHA-256: 9907b9d157fdcb6fba6cedf25f2d4638f7fe11146bbb88378d5437379e1794f1
font_01_sfnt_off0000f2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FE 10856 bytes
SHA-256: 0d39f027a696599782866fc6108029be79c79e8e1ef88e2785941788da16e6c4

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