Malicious PDF — malware analysis report

Static analysis result for SHA-256 36695b4de2d5e7c8…

MALICIOUS

PDF

74.3 KB Created: 2021-03-01 16:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 48fffc0dc09a78734cb61475990b8192 SHA-1: dfed312d6cd94426638ae7ec36105182246acb4d SHA-256: 36695b4de2d5e7c8eb6c16281ec97bea69680e3cc9cd88589245533e9af6a03e
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, indicating a phishing or trojan payload. 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, suggests a lure related to educational content, specifically a trigonometry video, to trick users into clicking the malicious link.

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://leonvi.ru/strik?utm_term=introduction+to+trigonometry+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468261/normal_6014c1a481ee0.pdfIn PDF document text
    • http://itdomen.fun/wosuzewelam622sq.pdfIn PDF document text
    • http://itactical.xyz/aula_internacional_1_audio_freeaal69.pdfIn PDF document text
    • http://getcabinets.xyz/medovarozofe1rrh1.pdfIn PDF document text
    • http://eliyalte.com/4726524682821g8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_602a8a55c78c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kokesatodixon/shiva_chillum_images.pdfIn PDF document text
    • http://butevagowug.epizy.com/thiamine_catalyzed_benzoin_condensation_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/mapokujivoku.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/80231098781.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/xutopezoko.pdfIn PDF document text
    • http://xekababemaxukop.rf.gd/ribulabobokiginepamo.pdfIn PDF document text
    • http://bamasagure.epizy.com/katy_perry_roar_mp4_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/renixawomejagubipoxaxij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD704 4820 bytes
SHA-256: b3fb7de8187178042f9f2f742a7206cdc72971b3c19392dc7de89147209aac9e
font_01_sfnt_off0000e755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE755 10736 bytes
SHA-256: 35f522ed8b16cf73f667a9a1a39464c73325ffdc816eb9002ffce98489c9fa03
font_02_sfnt_off00010c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C25 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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