Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d5ca6656c89dc6…

MALICIOUS

PDF

76.7 KB Created: 2021-02-27 19:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f439c8542ce445187750bce9ba962d0f SHA-1: eedbbe2bf35fa6b08de302855700ff3d31581bb6 SHA-256: a3d5ca6656c89dc6470661c83d0d60331edfd2bf10317deceff427fe55673789
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. The document body, though heavily obfuscated, appears to be a lure related to 'quantum number practice worksheet with answers'.

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://jacksth.ru/wix?keyword=quantum+number+practice+worksheet+with+answers PDF link annotation
    • http://tufuwavaziga.mygamesonline.org/todepojewukovuxuvokazuwo.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/wamalivaxavazexi.pdfIn PDF document text
    • http://coolvdomaion.online/sumuxasapemubeju5m9c7.pdfIn PDF document text
    • http://detonicro.website/jay-_z_vol._2._hard_knock_lifejq2fz.pdfIn PDF document text
    • http://mainsale.pro/answer_to_divorce_complaint_massachusettsk509i.pdfIn PDF document text
    • http://swast-group.website/75802367560vnmvi.pdfIn PDF document text
    • http://fevinoreniwelik.sportsontheweb.net/funivo.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/sojuravewi/nadivusatu.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/15209070097.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/yamaha_dgx_650_price_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/wiroregodixaxolakagukakun.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/lamelo_ball_draft_report.pdfIn PDF document text
    • http://zutadelunixirot.epizy.com/nice_guidelines_2019_asthma.pdfIn PDF document text
    • http://ginozegi.epizy.com/can_honda_civic_hybrid_run_without_ima_battery.pdfIn PDF document text
    • http://zozusanom.epizy.com/wave_tom_jobim_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/58295639668.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/lizofefogoluxesibegafexa.pdfIn PDF document text
    • http://zutoribi.rf.gd/55764987732.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/61513672348.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/smadav_2014_antivirus_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/counter_terrorist_2_mod_apk_android_1.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_off0000e0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B4 5380 bytes
SHA-256: 4151cdc23f556daa90eb19a89030f787d59dede5db2e379b7c1d996899cc853d
font_01_sfnt_off0000f2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 10576 bytes
SHA-256: 3763a2497848464583f834cc6e3a6313886389624f516277fbd2cfc4f698c6eb
font_02_sfnt_off000116d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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