Malicious PDF — malware analysis report

Static analysis result for SHA-256 31fa3485cec19651…

MALICIOUS

PDF

78.1 KB Created: 2021-02-26 10:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 48b78105988844c66d4bcec70c5ce142 SHA-1: 724bd2edb87838a5c44a45eb917dd7929f6be995 SHA-256: 31fa3485cec19651c329e59074abd41140be90c613dbf9ccf0f3faa2328b229d
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, and ClamAV detection confirms its malicious nature. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, appears to contain keywords related to the embedded URL, suggesting a phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/award?keyword=how+to+stop+first+alert+carbon+monoxide+detector+from+beeping PDF link annotation
    • http://xoxuvajes.mywebcommunity.org/xeron.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/Sghgec2/dunkleosteus_ark_the_island.pdfIn PDF document text
    • https://mefixakiderix.weebly.com/uploads/1/3/4/3/134319494/511bdaec8fcd.pdfIn PDF document text
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/mabigawen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467593/normal_5ffa6039a53e7.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/aiacgds/wsdot_ferry_schedule_anacortes_to_orcas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_6018bbbf02f88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445326/normal_602400aeab161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://watijosanowo.epizy.com/audiolivro_o_cortio.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/generador_automatico_de_bibliografia_formato_apa.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/remuledozesovunexaw.pdfIn PDF document text
    • http://jagogapibibolin.epizy.com/small_baby_dance_whatsapp_status.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/tirofuwedivozanokezi.pdfIn PDF document text
    • http://rozopujonabesix.epizy.com/beautiful_alpana_image.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/zogugenonidozaliwixidup.pdfIn PDF document text
    • http://nekoraxevab.rf.gd/26024874908.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_off0000f2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F1 5736 bytes
SHA-256: 02515d9f6c6d8dd1bf8efecc789309ca263c37c3973aef253f49e3cbeefba745
font_01_sfnt_off0001066f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066F 10608 bytes
SHA-256: 94a3ddc3824d62f180ab7378f073e762aa468838bd926311773b34155f361bdf

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