Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff9cbf8ac0d2522…

MALICIOUS

PDF

72.4 KB Created: 2021-02-15 14:28:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b9acfcaef11ea7d76bace5d6ee12cf0b SHA-1: ee9b503dcc962e91682b4d017f078f9c8b9b9f88 SHA-256: 3ff9cbf8ac0d25221a26763e113ed01bd7787d5e444d6f6297ef4b3e619ebf8d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=irony+in+letter+from+birmingham+jail PDF link annotation
    • https://cdn.sqhk.co/dojatejij/MimEEih/wimokoxibaxisogudesinewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_600c9c000415c.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/jhw0thd/zombs_io_hack_no_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425214/normal_5fca05926a230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5fd7c7a75c58a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480736/normal_5feef012419cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407795/normal_6013f11b05042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393220/normal_600a05ef191c3.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/hCdZjg5/91229409547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480744/normal_6011b51e7e626.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/Jum0jdb/15174895895.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449779/normal_5fcf681c6654b.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/xasovewipeje/35915355251.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/xemafupuwofitejopen.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/philips_juicer_hr1861_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/baghban_songs_video.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_off0000de59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE59 5260 bytes
SHA-256: 36dc6499a362f95196ec80341f24ee530f1e81939a052af840f68dabd738cd68
font_01_sfnt_off0000f022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF022 10828 bytes
SHA-256: a20586de0ba8a8cf0a93758ce6cdc78c5cf4775bb69c06a51d81e38bad923024