Malicious PDF — malware analysis report

Static analysis result for SHA-256 21eecf5fa3db6cf1…

MALICIOUS

PDF

79.7 KB Created: 2021-05-08 16:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7832e6724c0cd41bb446bf4b98b496cb SHA-1: 742ff36730a721fb724d51a30f7f11d27e3b0f1f SHA-256: 21eecf5fa3db6cf160fd938e28e38515a73219463ba039133a6531fa9e9c3b92
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when visited, likely leads to a phishing or malware download page. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. The document body, though heavily obfuscated, contains text related to a dehumidifier manual, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=frigidaire+dehumidifier+30+pint+manual
    • https://cdn.sqhk.co/kabevapixox/TdjK8MG/whatsapp_business_story_saver_apk.pdf
    • http://jujavekerubeko.scienceontheweb.net/hippocrates_aphorisms.pdf
    • https://cdn.sqhk.co/xemugugafot/HhjVrej/lucky_block_mod_1._8._9_download.pdf
    • http://vodaxuf.iblogger.org/tetivaxifikugadu.pdf
    • http://roskycnmx.com/66252401095bmkuy.pdf
    • http://gigezesuzobe.getenjoyment.net/concepto_de_anemia_ferropenica.pdf
    • https://cdn.sqhk.co/juvanejejuwo/ihjdF98/iihf_world_juniors_2020_team_canada_roster.pdf
    • http://paselon.getenjoyment.net/17499646906.pdf
    • https://cdn.sqhk.co/sesakiwewe/zhax7Ma/padamavaji.pdf
    • http://gepokupaburorew.mywebcommunity.org/12436079479.pdf
    • http://frut-tree.site/zinewuwizuvnyab0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://mojozore.myartsonline.com/fixek.pdf
    • http://wupubobetob.epizy.com/digunalobudif.pdf
    • http://kanulojijuk.rf.gd/raw_vegan_recipes.pdf
    • http://rakemexovujepez.epizy.com/kantar_omnichannel_report.pdf
    • https://s3.amazonaws.com/bupesejirijejus/frank_ocean_ivy_piano_sheet_music.pdf
    • https://s3.amazonaws.com/tezude/21140028802.pdf
    • http://nuxiluruzijova.epizy.com/siwunajuja.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eafa.bin
d90351c1ac0c6890b5b43125e4c3dc22d3afdd621d3adeaf74fb14617506cbb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFA 5308 bytes
font_01_sfnt_off0000fcdc.bin
be440d940a4393e48103f48490b185a5e797a92d38a481b9508fd44dc9bbed26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDC 11516 bytes
font_02_sfnt_off0001240d.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1240D 4324 bytes

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