Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ce953ed441443d…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 11:03:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 047670d2b0011f1c248de67811bd1251 SHA-1: 86e316b089087ea7f34ed6262b5dee60b2b0b728 SHA-256: 73ce953ed441443d5de31e79e3cc542a5db60dae8a9a0ffa487d6b51923c5621
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'soxebez.ru' which is likely part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host many links on disposable domains, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://soxebez.ru/wb?keyword=game%20of%20thrones%20full%20book%20series PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485699/normal_60264cfc2ee00.pdfIn PDF document text
    • https://sujumakatu.weebly.com/uploads/1/3/1/3/131379709/lalabapivabekedijewa.pdfIn PDF document text
    • http://lesantyqas.online/20886074948c6ytp.pdfIn PDF document text
    • http://pumba-timon.space/76221490725gn39x.pdfIn PDF document text
    • https://kabezanaxojuzer.weebly.com/uploads/1/3/4/2/134234652/vuloreta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527164/normal_5fca9124b39a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387703/normal_6039655fad30b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420037/normal_6022116aec24c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_60179ce21b1a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469365/normal_5ff64ec998a9e.pdfIn PDF document text
    • http://ukranews.site/60872392036esj3w.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/raboxakupi_razudavunavov_rimako.pdfIn PDF document text
    • https://besaxujujugolu.weebly.com/uploads/1/3/0/7/130739491/2d46e29a6c96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458150/normal_6003919b25097.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fozubada.rf.gd/mivakolugijilamapi.pdfIn PDF document text
    • http://vovugawe.rf.gd/fulejikenegaxukaridevus.pdfIn PDF document text
    • http://lapefub.epizy.com/how_much_is_a_used_traeger_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/87283885106.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/fovijojegogivururatoli.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/ac_store_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/autocad_2020_student_version_free.pdfIn PDF document text
    • http://fabomisibis.rf.gd/97635542493.pdfIn PDF document text
    • http://gagafexekoxoseb.epizy.com/zoxuf.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_off0000f04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 5240 bytes
SHA-256: cc4c5b7f9f19b32218c177045a910a03c763900fecf9e7229d566b4faa497c20
font_01_sfnt_off000101fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FC 10948 bytes
SHA-256: f445ec15f8bbb63dc911750d4f0c4f8ce9f3a0000568c125868a6eee1aacd206

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