Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1679ed1021c32e…

MALICIOUS

PDF

87.8 KB Created: 2021-02-09 05:03:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ba642517400dbab189bea3595d1ba822 SHA-1: 48651ef01e01ae7a908c897d5bdacbe1e9dc81df SHA-256: fd1679ed1021c32ed96d0d36f64c053fe974b447121fd12b3648eda93a2d6ec8
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wb?keyword=ms%20word%20online%20test%20questions%20and%20answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492240/normal_5fe4ab72dbe69.pdfIn PDF document text
    • http://novedexezenel.66ghz.com/88448164521.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_600bb0d68ad13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450152/normal_5fe118aeee504.pdfIn PDF document text
    • https://cdn.sqhk.co/lajoroteb/cgf6Lgd/51211267217.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401732/normal_6007a81d64e49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415326/normal_6012e0bb34233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_6012c4c486aeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484805/normal_5fd6121f7e28f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5fdc238f1922e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pajofaliwiwa.rf.gd/templates_powerpoint_medical_nurse_free.pdfIn PDF document text
    • http://zatojigetafugud.epizy.com/xanebabitaze.pdfIn PDF document text
    • http://zasuzutan.rf.gd/mavozaroz.pdfIn PDF document text
    • http://jufawananifufa.rf.gd/integer_word_problems_grade_7_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/hays_timesheet_help.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_off00011ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCF 5040 bytes
SHA-256: 6566f0b53b7ef335de5eb9bb3686ae21ea16c7efcb2b8b2ca9f750685407925a
font_01_sfnt_off00012e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E19 10676 bytes
SHA-256: f164ab4cd2a5519a852d2e8da9624f697ee53e2de9c8bb2b029bbc3784282f45