Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc25bb3b37251259…

MALICIOUS

PDF

78.2 KB Created: 2021-03-02 09:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f20ba3fb8633380662cba0dcb4728e32 SHA-1: 99ceb3758438a82edbbfb0f20c5745d8f09b0348 SHA-256: bc25bb3b372512593befb6c7719cfd4ab4d23df1a656239cb055f4ffee47ad9a
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 deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to an 'answer key' for a worksheet, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=measures+mean+median+mode+and+range+-+independent+practice+worksheet+answer+key PDF link annotation
    • http://raisinshq.pro/suneginatipuninudoxopk77se.pdfIn PDF document text
    • http://vigopokis.iblogger.org/cakewalk_sonar_home_studio_7_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411490/normal_60052753cc3d9.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/hfjfR5F/cutie_garden_game_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/PoHtJgj/wacom_apple_app.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/pofokajubexisis.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/kivodavevinog.pdfIn PDF document text
    • http://fimewot.xyz/the_alabaster_girl_quotesxr1wh.pdfIn PDF document text
    • http://terem.space/history_of_the_world_i_guess_bill_wurtzmthx0.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/zRjhggH/xubobapa.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/kesumasaka/atomic_structure_class_11.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/loregolazidi.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/49618744825.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/ronevuforirajeguguzapo.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/mercedes_glc_amg_63_performance.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_off0000e2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D3 5632 bytes
SHA-256: 81222752dac28b027fadf595e1e773f88cd7a79d1a837a54b065a22465dea77b
font_01_sfnt_off0000f5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F2 11272 bytes
SHA-256: eda47a7dac3c24cde37356cca7b4d9b1ed6b89d8731b1fbfa6199ef041a3f96b
font_02_sfnt_off00011c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.