Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a13069a92788d8…

MALICIOUS

PDF

76.4 KB Created: 2021-04-10 11:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d638b2734c452bec5cd7147d178d1d9 SHA-1: 1449444ecb89b1e242dd78cfd15e40f917a40064 SHA-256: c5a13069a92788d8ad84c4ebae19b3f20c9f0124c20442a321d1d84e183d5c6b
96 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one prominent URL pointing to a suspicious domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it is designed to lure users to a malicious website, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://vilenefex.ru/strik?utm_term=who+makes+first+response+pregnancy+test
    • https://static.s123-cdn-static.com/uploads/4378831/normal_5fef1181f3acc.pdf
    • http://itanah.space/66893568481wf5rn.pdf
    • https://static.s123-cdn-static.com/uploads/4494451/normal_5fcc46ed99118.pdf
    • https://cdn-cms.f-static.net/uploads/4414352/normal_60622f37bce43.pdf
    • https://cdn-cms.f-static.net/uploads/4504554/normal_600cb8617d882.pdf
    • http://gifozazupu.iblogger.org/mobile_love_call_ringtone_free.pdf
    • https://cdn-cms.f-static.net/uploads/4410703/normal_606e615894aee.pdf
    • http://lajenasuwo.iblogger.org/42983526861.pdf
    • http://shoop-ff.ru/surfboard_sbg6782-ac_manual8br5e.pdf
    • http://probkin34.xyz/libro_historia_universal_freakevj6l.pdf
    • https://static.s123-cdn-static.com/uploads/4372737/normal_5fca343d9b2de.pdf
    • http://sportplays.ru/36341689559ffb9t.pdf
    • https://cdn-cms.f-static.net/uploads/4387699/normal_60437939c360a.pdf
    • https://cdn-cms.f-static.net/uploads/4366400/normal_605c509e3e7e9.pdf
    • http://opros.xyz/dudurolofibekufatawekujsqguh.pdf
    • https://static.s123-cdn-static.com/uploads/4402262/normal_5ffba036811df.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5d034ec5-7494-4fa9-8207-d4f04e846441/law_of_evidence_bare_act_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/16a5649c-1229-48fc-b7a9-467df4226be0/furul.pdf
    • https://uploads.strikinglycdn.com/files/790ff5de-b83d-416d-bed2-785bce773900/garmin_oregon_450_review.pdf
    • https://uploads.strikinglycdn.com/files/1b60d12b-642f-4043-965e-ba69a061dd3d/mesa_de_som_yamaha_mg20xu_manual.pdf
    • https://uploads.strikinglycdn.com/files/e1c5e1bc-74eb-476e-80ab-edcb45387222/21576679111.pdf
    • https://uploads.strikinglycdn.com/files/0329dad5-4b7a-4a4c-b399-f58bf0fcdd16/tokyo_ghoul_season_3_netflix_release_date_australia.pdf
    • https://uploads.strikinglycdn.com/files/93a3b71c-2177-47df-b7c9-73ecd237db81/97053179410.pdf
    • https://uploads.strikinglycdn.com/files/5fe96ffc-f506-4b5b-9d8e-a28e0392f60f/44406999772.pdf
    • http://buvumitibeve.rf.gd/benilunugijibimibidapal.pdf
    • http://jizokotasaz.rf.gd/how_to_change_schlage_smart_lock_code.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_off0000ebb3.bin
a530a1216e2d459154df9cddd13e85645855f010e7c7abb69ef2b4e5d60a9250		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB3 5576 bytes
font_01_sfnt_off0000fe9a.bin
d788a604d3379b788a41cdcbd28f40db1bd84d59d7b222d6859f8d2329901f29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9A 10916 bytes

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