Malicious PDF — malware analysis report

Static analysis result for SHA-256 52af04633267560f…

MALICIOUS

PDF

96.3 KB Created: 2021-03-19 11:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffb765988b9f1884c333d919d3e2764b SHA-1: 121594932474b126033cc83d39d25502ee627f8e SHA-256: 52af04633267560f8b8534ee34eeda1635632f9dcc5471f3f0cba1f3c7276818
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a potential phishing lure. ClamAV also detected this file as Pdf.Phishing.Trojan. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/strik?utm_term=the+company+of+wolves+story+analysis
    • https://cdn-cms.f-static.net/uploads/4488572/normal_603585ab19a5b.pdf
    • http://ighelpcenter.xyz/english_language_and_composition_section_1_answersquexi.pdf
    • http://janafan.scienceontheweb.net/81140970502.pdf
    • https://cdn-cms.f-static.net/uploads/4443814/normal_600e389d0f74d.pdf
    • https://cdn-cms.f-static.net/uploads/4495037/normal_603e937d9b76a.pdf
    • http://dress-russia.ru/56783567380h608r.pdf
    • https://static.s123-cdn-static.com/uploads/4464083/normal_6008c4dd1c1e5.pdf
    • http://dezowem.medianewsonline.com/perubanemajubonodav.pdf
    • http://vabodulesofife.22web.org/what_types_of_functions_have_vertical_asymptotes.pdf
    • https://cdn-cms.f-static.net/uploads/4491669/normal_603a5c228576d.pdf
    • http://meetsalle.xyz/nuwetozjktm0.pdf
    • http://iciapp.xyz/ven_y_toma_el_trono_medley71dov.pdf
    • http://verifiedbadge-lnstagram.com/giorno_theme_trumpet_sheet_music6yavx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c3582bf8-0725-4ee9-91b8-5afcfd4dc159/ropidisoze.pdf
    • https://uploads.strikinglycdn.com/files/dc2c8982-73e4-43c4-a5ef-fbe45c20a804/5614874059.pdf
    • http://dakafatuvuguviz.atwebpages.com/icewind_dale_2_hints.pdf
    • https://uploads.strikinglycdn.com/files/cedd7cf3-d993-40d5-815c-68a0a9210dc0/sample_employee_evaluation_reports.pdf
    • https://uploads.strikinglycdn.com/files/06f9dbf5-05a2-4e61-a54d-e843a7661460/is_keto_really_worth_it.pdf
    • https://uploads.strikinglycdn.com/files/009e96aa-f06c-421e-a343-e1243718e70b/40683604766.pdf
    • https://uploads.strikinglycdn.com/files/2d9b575b-906a-4cf3-875d-03e88619f8be/70899812830.pdf
    • https://uploads.strikinglycdn.com/files/b6019700-d64d-4b7b-acbd-1b09f8509b1f/joloxipitoxizunepexumu.pdf
    • http://fomudugeriju.epizy.com/18757673920.pdf
    • http://lunowakaneruf.rf.gd/sibozer.pdf
    • https://uploads.strikinglycdn.com/files/6699e4a1-dac7-460e-a92d-17e670c3871d/zabukig.pdf
    • https://uploads.strikinglycdn.com/files/70152682-60d2-4905-9fc5-3af630e1b6f4/63695353502.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000139ef.bin
ce13cd50d0440e512fde598f4295770d5dc69cd8fc0e171310b509fc4092d1b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139EF 5460 bytes
font_01_sfnt_off00014c77.bin
74a19d84436db51e2a7dacb4963db52996ca76a453884cdb0b78b85da20fa0d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C77 11012 bytes

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