Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b003afbb59ad327…

MALICIOUS

PDF

79.4 KB Created: 2021-03-16 23:58:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5852fab895390726dfe34e86204540e0 SHA-1: 544a994e1edbfc975c1e510914ec70575831d415 SHA-256: 3b003afbb59ad32728b2e5d4edb0147d89ed7ea4e80c117fe00afbac06e75399
104 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, which is likely a lure for downloading malware. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to software downloads, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=wolfram+alpha+1.4.6+apk+download PDF link annotation
    • http://flowerport.shop/94122524692aslaw.pdfIn PDF document text
    • http://martans.space/riminerakovwuako.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ffcf99e4e372.pdfIn PDF document text
    • http://vnatural.space/baviwavajenupejufeliboyl83.pdfIn PDF document text
    • http://claire-irk.ru/sub_zero_refrigerator_priceuani7.pdfIn PDF document text
    • http://teren.fun/lab_manual_for_andrews_a_guide_to_it_technical_support_9th_edition87edd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497344/normal_5fcaa966c37d1.pdfIn PDF document text
    • http://small-italy.space/64210153822yho9y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_602c673ae73e4.pdfIn PDF document text
    • http://velavedi.iblogger.org/57761325411.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/why_does_my_fabric_conditioner_not_drain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7235e8e0-6eb5-4d6a-8555-c4704f88d9fa/bamuzetezus.pdfIn PDF document text
    • http://punolubumima.epizy.com/8757027301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac3c5fc7-5e99-4488-9e21-9e8e7a246fe4/figure_drawing_models_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/utorrent_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/baxutadijuroludawuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/19925330780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b16d8e-484e-40c2-af6c-ef50606c160c/dabosijukasafine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5875ef9-bb53-4f2e-9452-61c0a4b2a933/22181421533.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/about_parallel_lines.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_off0000f129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF129 5600 bytes
SHA-256: fa5007a14b80db7246dda299a0cb6de49bc0eb32a625348c3633bdb1338d5a80
font_01_sfnt_off0001042c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042C 12716 bytes
SHA-256: 671fa4a63f908bada1b07f1e851e7c3efe2de08647c5c1901c3bed89a2436df9

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