Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bf8389f717cd56…

MALICIOUS

PDF

74.6 KB Created: 2021-02-18 23:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 99d607dc1efca9b312f9602b93a20f27 SHA-1: 73675ca46ece2ac9f8117ae626c1f1e4109d91bf SHA-256: f6bf8389f717cd5657e8aad9900f2d5974e74062f3c26822bc94af5b011e5e11
104 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains an external URI and urgency lures. The embedded URL, 'https://jacksth.ru/123?utm_term=sundance+hot+tub+flo2+error', is likely the primary vector for a phishing or malware download. Although no scripts were explicitly extracted, the PDF format and the nature of the URL suggest it could be used to deliver a malicious payload or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jacksth.ru/123?utm_term=sundance+hot+tub+flo2+error PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421477/normal_6002edc11a6e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480588/normal_5ffa3ca3e8728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464068/normal_601c863109eef.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/iiaib11/bawewudunofupepufi.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/RgibSjg/bomb_chicken_monterey_park_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/iibjjib/30196094419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484993/normal_5fdbca57f0f83.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/ijiaw9o/gunner_olszewski_patriots_stats.pdfIn PDF document text
    • https://cdn.sqhk.co/mipekakiri/Drs9Qhh/project_manager_interview_questions_microsoft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486969/normal_5fe8b4bbd1cfd.pdfIn PDF document text
    • https://cdn.sqhk.co/miwataxanis/geiephd/pirexaxomemuwasemad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5fd048f60a7f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_600c8a6ade621.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/Bijicjc/cannonball_show_2020_sign_up.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426832/normal_5fe0710ca52a6.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/fgjiajd/50966432259.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/bojafazes/eclecticism_in_language_teaching.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/26523561754.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/zubulorelofemoberunon.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_off0000e6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BA 5304 bytes
SHA-256: 173200e3d2de3b10d12d0512507085e333ef1394e0f91cefc484b68d35ba74ab
font_01_sfnt_off0000f8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C4 10816 bytes
SHA-256: 2e5c99332dfffe5119413c07cd7e00b04b3c49400a9da673b96bf869e7106dc1

Open this report in the interactive analyzer, or submit your own file for analysis.