Malicious PDF — malware analysis report

Static analysis result for SHA-256 6401a1203f83ff8a…

MALICIOUS

PDF

312.6 KB Created: 2021-03-22 09:31:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bbf14344f310419b86444febfd9bd6a SHA-1: ea4d16f6888e1df80e1c08b74cdd44ee1472aade SHA-256: 6401a1203f83ff8a492852006b9f0f4714a3f899cad87c62af22e988b9fcb1ae
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to loans and urgency, supporting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://xezojetit.ru/wix?keyword=nation+21+loans
    • https://cdn-cms.f-static.net/uploads/4426820/normal_603aafb4c6a1e.pdf
    • https://cdn-cms.f-static.net/uploads/4369334/normal_6056a587cef98.pdf
    • https://static.s123-cdn-static.com/uploads/4376372/normal_5feff26faf3a2.pdf
    • https://cdn-cms.f-static.net/uploads/4405208/normal_604a22cfd98ed.pdf
    • https://static.s123-cdn-static.com/uploads/4456372/normal_5ff56b2ed7a1d.pdf
    • http://fosireditoj.mygamesonline.org/annuity_sample_problems_with_solutions.pdf
    • https://static.s123-cdn-static.com/uploads/4369183/normal_5fc673f8297db.pdf
    • https://static.s123-cdn-static.com/uploads/4478926/normal_5fdd725c44b4f.pdf
    • https://cdn-cms.f-static.net/uploads/4369152/normal_6030329e09627.pdf
    • https://static.s123-cdn-static.com/uploads/4456387/normal_5ff67590c6918.pdf
    • http://gesoxusem.iblogger.org/99650498914.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_0f6c77a11c2147ab885fd6e4f3981704.pdf?index=true
    • http://zubiluwetij.myartsonline.com/10973239425.pdf
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_a15ff3a478274d9b9959e45f77efd1bf.pdf?index=true
    • http://pusapovewazigu.onlinewebshop.net/herramientas_de_almacenamiento_en_la_nube.pdf
    • https://uploads.strikinglycdn.com/files/c805b0ba-f1ec-4074-9bbf-723a3cb2076b/meaning_of_traditional_musical_instruments.pdf
    • http://xirofapinowud.atwebpages.com/algoritmos_genticos_con_python.pdf
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_b48afab1906b42d99b19acc70bd98592.pdf?index=true
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_c749272058a44abeab5e96e60126bf4e.pdf?index=true
    • http://sekuwomexapa.myartsonline.com/47942538579.pdf
    • https://uploads.strikinglycdn.com/files/f85fbfa4-b699-4fdb-9956-43ab78e81dea/61284475795.pdf
    • https://uploads.strikinglycdn.com/files/5565f773-65d9-422b-99ec-732f53049e8b/11_day_diet_fat_loss_for_idiots.pdf
    • http://zikefibuji.rf.gd/flowers_for_algernon_summary_progress_report_17.pdf
    • http://varoxekoduv.epizy.com/bluebook_20th_edition_free.pdf
    • http://satekivu.rf.gd/vilafijivabix.pdf
    • http://lowazuxakosilal.epizy.com/microsoft_sculpt_comfort_keyboard_and_mouse_driver.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000489d0.bin
b51ad9ee1e6c4d904456050e5967062eb283869848bc14c328af2f80cae47dc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x489D0 4408 bytes
font_01_sfnt_off000498c6.bin
3720d95185c9bf6fa0d5f4ba837d14cc546d94d53628511e50837f309f9b3159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x498C6 12636 bytes
font_02_sfnt_off0004c3a8.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C3A8 4324 bytes

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