Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b88091ad3bbfb2…

MALICIOUS

PDF

78.4 KB Created: 2020-11-29 01:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8411eb41cbfaf9f113e209cc015bfa99 SHA-1: 8a317a7879c5f980f766a2ba0b9d3464c52a3e49 SHA-256: f6b88091ad3bbfb2590c7a24780ed3676fcdbf1cc479b4081da583aaa9bd09ef
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to download a 'chase mobile apk'. This, combined with the ML classifier and ClamAV detection, strongly suggests a phishing attempt to trick users into installing a malicious application. No scripts were extracted, but the presence of an external URI and the overall detection indicate a malicious intent.

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://traffine.ru/strik?utm_term=chase+mobile+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421934/normal_5f970d09d7e6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_5f94494dd662a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_5f9bc72609a7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_5fa68f524f2b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470402/normal_5fa7f66ddaabf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5f8fa5fd33a3a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/107ec274-bc7c-4981-afe2-84e27fe80f0f/meditation_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/puvofexazijolofodosumod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff790099-f5eb-4f68-bf93-7675d9d05e4c/matojuxofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/455b42af-690a-4c2c-b58c-04b452190282/red_jasmine_vinton_va.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/loxafadanawenaduxezetus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35474090-5ed1-421e-bb18-2cb729c39bc5/2318206631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e957ea25-4319-458d-984a-11145d19a96a/95_ford_mustang_cobra.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/acer_aspire_axc-603g-uw13_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/mera_bhai_mera_bhai_song_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE511 4792 bytes
SHA-256: be898e966f3a34d478024dcfd81eb31f9085332e572b8d2463dffc186427abd6
font_01_sfnt_off0000f554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF554 12532 bytes
SHA-256: 3300f8ef41d7f98511317ca445661566a72f4a8648407bcb78fc1f729f0b3528
font_02_sfnt_off00011d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D86 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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