Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b70fb698311eafc…

MALICIOUS

PDF

71.7 KB Created: 2021-03-19 11:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5784631d6251ca3cb75fdc43856f64a1 SHA-1: 73122a80a94f349dbf203d8b29f6f6b9604b8f62 SHA-256: 4b70fb698311eafc5e317482f000fd17ee3a4f52a5c3596a28b9cf103bb41d17
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as malicious by multiple heuristics and a machine learning classifier. The document body, though heavily obfuscated, suggests a lure related to 'Blue harbor auto'. The presence of external URIs and the ML classification strongly indicate a phishing or malware distribution attempt, likely leveraging a spearphishing attachment vector. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=blue+harbor+auto
    • http://feyakast.online/93767338815vd3pg.pdf
    • http://miiliioner.xyz/510517272036tphm.pdf
    • http://healthyforczechrepublic.site/why_my_furnace_blowing_cold_air27y34.pdf
    • http://pc-remont.website/god_chasers_quotestbuoy.pdf
    • http://mscredit.info/music_downloader_free_mp3_downloadfqkni.pdf
    • http://xudogiborijum.66ghz.com/40605260489.pdf
    • http://openplafond.xyz/tutepatagabogobonomiva51941.pdf
    • http://all-host.site/93388421254nbzsu.pdf
    • http://organicsss.space/18305624015j2mhe.pdf
    • http://zanartcc.net/regegilomdx3w.pdf
    • http://tersq.fun/351994746321ie9j.pdf
    • http://on-arenas.com/naxigexepumuloxuvadazexx2rf.pdf
    • http://ketosimple.online/reported_speech_in_spanish_exercisescjik9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_28f8f31cc0634669b5bc576c01898519.pdf?index=true
    • http://zidarebuna.epizy.com/17466362358.pdf
    • http://gowasikokini.epizy.com/can_you_read_books_on_kindle_paperwhite.pdf
    • http://tixinova.rf.gd/animal_jam_play_wild_windows.pdf
    • http://jasagola.epizy.com/72501083051.pdf
    • http://sukeboragepude.epizy.com/xowewebobufixojenut.pdf
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_88a164e363f94e00b4ab15bf94ea7d82.pdf?index=true
    • http://mumizoxagoguros.rf.gd/c_template_where_multiple_classes.pdf
    • http://mapodivopabo.rf.gd/m_audio_keystation_88_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd6b.bin
b1b571e1de3888b6b6837d599c4c10f9fad5d2165db46a7c90de6f790886c21b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 4784 bytes
font_01_sfnt_off0000eda5.bin
eba8e7456ce477ac97245ff0f5d59ba2ae929767248299ef7dfaf998c2d5d845		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA5 10576 bytes

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