Malicious PDF — malware analysis report

Static analysis result for SHA-256 244bdf3037f5c3fd…

MALICIOUS

PDF

75.8 KB Created: 2021-03-14 22:10:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa36a5649c8da88262713c0afca6b4d6 SHA-1: 9b89ead46b2d49baeb05707b79b15f46e14ab5c9 SHA-256: 244bdf3037f5c3fd8344c555a9a7ca039ec06b64eddf25f2a07fe1aed5c48883
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, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely the primary lure. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/award?keyword=gallbladder+diet+pdf+spanish
    • http://pixenevalir.22web.org/gaxamu.pdf
    • https://static.s123-cdn-static.com/uploads/4404741/normal_5fe1724b29157.pdf
    • http://lakaxof.iblogger.org/zolasapemubodofitafebegu.pdf
    • https://cdn-cms.f-static.net/uploads/4388426/normal_60225ffa7ca78.pdf
    • https://cdn-cms.f-static.net/uploads/4446275/normal_5fdb1f377fa51.pdf
    • http://vutazumadik.iblogger.org/92843173650.pdf
    • https://cdn-cms.f-static.net/uploads/4426550/normal_60386da63725e.pdf
    • http://vkysnaya-eda.site/cravings_chrissy_teigen_free1snp5.pdf
    • https://static.s123-cdn-static.com/uploads/4408176/normal_5feb70c61683d.pdf
    • http://lenagilos.22web.org/21748109007.pdf
    • http://copyright-help-center.com/cross_linking_theory_proteinqyuky.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gavojomizam.epizy.com/wilepunupimagaligazidatin.pdf
    • http://ravotosaxubepom.epizy.com/george_orwell_animal_farm_audiobook_free.pdf
    • https://s3.amazonaws.com/zopenave/metal_casting_simulation_software_free.pdf
    • https://s3.amazonaws.com/fulosobezur/sad_background_music_for_presentation_free.pdf
    • https://s3.amazonaws.com/wixanarer/jilosofaferudine.pdf
    • http://fujurojulode.rf.gd/gaxipafijos.pdf
    • http://vobivasi.rf.gd/sovozora.pdf
    • https://s3.amazonaws.com/dopugaxelelema/73185679510.pdf
    • http://lemaponu.rf.gd/simovavevanef.pdf
    • http://sitasuwa.epizy.com/31893225243.pdf
    • http://gagewon.epizy.com/acer_aspire_v3_771g_bios_key.pdf
    • http://sabulawum.rf.gd/animals_sounds_and_pictures.pdf
    • http://povasapodojika.epizy.com/18619985367.pdf
    • http://magivaxinel.rf.gd/goods_inward_inspection_report.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_off0000eab8.bin
b5250c00b2d9b21d2ec7ed95761d4ffbe7d8c2805be3e229eb2c299d0ad233de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB8 5300 bytes
font_01_sfnt_off0000fcaf.bin
fa3a7d6bf197092a5e9d16d4f184b3279f14677ce63cf2c4ce29da70536064df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAF 11044 bytes

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