Malicious PDF — malware analysis report

Static analysis result for SHA-256 da93415b10f94d41…

MALICIOUS

PDF

77.2 KB Created: 2021-03-01 10:24:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 128e47a32486c75ad7021c46bd91ac93 SHA-1: 50cc7590f39eefd17c32d55d132562222f49f436 SHA-256: da93415b10f94d4185df67c66e2dc1798cc61386fc1a8c3c1326b57a9b8f5daf
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, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host malicious content or redirect the user. The document body, though heavily obfuscated, appears to contain keywords related to educational materials, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/wix?keyword=sadlier+vocabulary+workshop+level+g+unit+1+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369793/normal_60302ed49150f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408983/normal_6017503402caa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445550/normal_5fdbd95c5d110.pdfIn PDF document text
    • http://stingeksoj.online/765088298436usq9.pdfIn PDF document text
    • http://podarokinsta.online/what_is_the_functional_analysis_in_sociology862ki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_602d72e5ef8cc.pdfIn PDF document text
    • http://clipshd.design/amasezerano_y_akazizswqh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tademapapoli.epizy.com/fizujuzevigumepu.pdfIn PDF document text
    • http://nokefibazapowem.rf.gd/free_colouring_sheets_paw_patrol.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/is_there_a_book_for_big_little_lies_season_2.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/seo_tutorial_for_beginners_step_by_step.pdfIn PDF document text
    • http://sokagozu.rf.gd/70443971930.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/73983869176.pdfIn PDF document text
    • http://donosusiligid.rf.gd/chagallu_weather_report_today.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/rubafudibelovowozorej.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/damsel_movie_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/ayushman_bharat_list.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_off0000f0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F4 5948 bytes
SHA-256: decc1ea122a09b2a8525911326eecfd460f48866af7ca3da3ea16b97e2c9d7dd
font_01_sfnt_off00010547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10547 9876 bytes
SHA-256: 5537fce6cd171802baafee21a02449f49e4a4a743c82250adfe371b840d8a85c

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