Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4b20387439b0ba…

MALICIOUS

PDF

62.1 KB Created: 2020-12-14 22:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 718622557141dc286b5d906101890e89 SHA-1: b1c42093d6e8c7c54f37edd3de13d43ab3837ed0 SHA-256: be4b20387439b0ba1ec891bc2a147035c892fdc4680e12e87ea85ed0d78790d7
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a phishing-related domain, suggesting the document is part of a phishing campaign. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to lure users into downloading further malicious content, likely through embedded links.

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://trafficel.ru/strik?utm_term=conditional+statement+geometry+worksheets PDF link annotation
    • https://nukoxifade.weebly.com/uploads/1/3/4/3/134332817/josozogapemil-xikafupe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_5fc8adabefbf3.pdfIn PDF document text
    • https://fimetopim.weebly.com/uploads/1/3/4/3/134399480/3979714.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/648a44abab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bagisi/gba_emulator_free_for_windows_10.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17dd3405d5340f32dc63c/t/5fc46340a97599144e84d938/1606705985516/musical_theatre_west_little_mermaid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e511c9-461b-48ac-8fc2-89f660aed848/tedalutudejetugi.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/toshiba_dkt3220_sd_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5662f0b6b03258f5376ce/t/5fc91ec8845d5609afcb670d/1607016138640/ocotillo_wells_rentals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af3681b-fee3-4eea-b782-fa55e6450b8f/we_bare_bears_season_4_dailymotion.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b7e881fec0096843ffa9/t/5fd0426a0c0c9b10ab028978/1607484012545/k_yamet_kombat_arena_apk_oyun_indir_club.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/estacada_high_school_pharmacy_hours.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_off0000b625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB625 5404 bytes
SHA-256: 4c56badd250f270471f8a416d497884f1644965a1e21e5ecc29b43e215e3ba45
font_01_sfnt_off0000c865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC865 10384 bytes
SHA-256: b9e11ca8f58d9714fee80abb90d534cedd9c01beaa589463cc1815e5be80146d

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