Malicious PDF — malware analysis report

Static analysis result for SHA-256 89654c7263a245bb…

MALICIOUS

PDF

78.6 KB Created: 2021-03-14 16:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dba777f40666a0fbbf7d6801e2880e5c SHA-1: 7c2b4978a579d34d6bf0a5aff1e26db0e4940b8a SHA-256: 89654c7263a245bbebc81659256b95571c386b96e2ec07b38cfd47d80daa1233
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution T1553.005 Security Software Tampering

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_SECURITY_BYPASS' suggests the document instructs the user to disable security software, a common tactic for malware delivery. The embedded URL 'https://resalured.ru/award?keyword=exogamous+marriage+pdf' is likely used to host or deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://resalured.ru/award?keyword=exogamous+marriage+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445735/normal_600afccbc08be.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/povijijisokuxidhbxa9.pdfIn PDF document text
    • https://cdn.sqhk.co/woferomot/McBighv/numbers_20-_100_in_english_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392857/normal_5fea0b578c3f2.pdfIn PDF document text
    • http://opensoda.pro/85540232833vxqzi.pdfIn PDF document text
    • http://cpskras.website/how_much_is_victoria_justice_worth1v77u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368230/normal_5fffc7aca8d64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484632/normal_5fff52b56a213.pdfIn PDF document text
    • https://cdn.sqhk.co/ketusugedi/bkhi6IN/best_song_ringtone_free_download_zedge.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/gta_san_andreas_trkiye_modu_tam_indirgj7hn.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/6287974272.pdfIn PDF document text
    • http://nonoxutiwi.mypressonline.com/luxulizezajef.pdfIn PDF document text
    • http://dalidusiz.mywebcommunity.org/visual_data_analysis_techniques.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/igjelvm/bitijegenekadobuka.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/wuwabobujasivor/fortiswitch_124e-_fpoe_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/install_3d_touch_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/mugebegijakorawefulonu.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/zamewigikesomixatekuje.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/78570119805.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/mizenamulutadajofi.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/94760926600.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_off0000f50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50D 5352 bytes
SHA-256: 1e22bc40f21f83ef37eff9cdc60d3ba2a9016596269e952a1dbaff054a8669b4
font_01_sfnt_off00010738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10738 11352 bytes
SHA-256: fcd566440a31f1e3adc2a9a682dbdfee7e66fc3d5de895394ace6dcf5afc8118

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