Malicious PDF — malware analysis report

Static analysis result for SHA-256 673b58bee27bdd76…

MALICIOUS

PDF

73.5 KB Created: 2021-02-23 17:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b66b5826f21df2b9cfd1e9ed723f5d4e SHA-1: d8186d2954aa2e6056d101c864623f30b8a30662 SHA-256: 673b58bee27bdd76b1c3e56f12de1e6c2744aa76b158e11ae419765835983b4d
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://crophysi.ru/123?utm_term=download+aplikasi+modoo+marble+indonesia`. The document body, though heavily obfuscated, suggests a lure related to downloading an application. The presence of a 'download button' heuristic and a 'password archive lure' further supports a malicious intent to trick the user into downloading and potentially opening a malicious file. No scripts were extracted, but the overall structure and URL reputation indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/123?utm_term=download+aplikasi+modoo+marble+indonesia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_601716c89fc01.pdfIn PDF document text
    • http://lozhobelir.space/lutaniruxemouhpzt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479905/normal_6020893108fde.pdfIn PDF document text
    • http://sunny-web.ru/modern_credit_risk_management_theory_and_practiceqriy7.pdfIn PDF document text
    • https://dipidedi.weebly.com/uploads/1/3/2/8/132815933/xuminitixirisuda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459625/normal_5fd94970d763a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489988/normal_5fee6ba23514a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496584/normal_5fc6dc25f39f5.pdfIn PDF document text
    • http://jitoletesavi.iblogger.org/tata_motors_limited_annual_report_2018-_19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496597/normal_5ff463af08027.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403118/normal_5fe48cd47c04c.pdfIn PDF document text
    • http://uscovidcharts.com/90130559464r3bbu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484815/normal_5fc5ee09dea1b.pdfIn PDF document text
    • http://bilkan.fun/feedback_sheet_creative_writingpnh6l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonogobujajeva.rf.gd/27069503590.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/55843706245.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/8967709877.pdfIn PDF document text
    • http://julatelowix.rf.gd/38386816556.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/winrar_5._71_full_version.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_off0000df5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 5400 bytes
SHA-256: 7e01fcd8cf8aac4d0e74a4428a9fb23b1f25c215aad5e1b5dab6b520bb4f6b46
font_01_sfnt_off0000f1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B2 11296 bytes
SHA-256: 16c76504ba49d4d53e5502aef12ab08545c6fdc42b5de12da72c132634fc3b9c

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