Malicious PDF — malware analysis report

Static analysis result for SHA-256 477ce88aa5769434…

MALICIOUS

PDF

73.1 KB Created: 2021-02-12 02:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0a95d2cf4b315b7e01b51a80f4fb62ff SHA-1: 2c43ab050855c61e9f24f1564d36cbea04ac6484 SHA-256: 477ce88aa57694341bd428d3b447a91fa7282bba977e1b3309d9d0607189c300
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with text related to Minecraft. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded malicious URL suggest it's designed to redirect users to a phishing or malware distribution site.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/123?utm_term=how+to+make+chest+in+minecraft In PDF document text
    • https://static.s123-cdn-static.com/uploads/4416506/normal_5fe0dbfb61edb.pdfIn PDF document text
    • https://werumitepoli.weebly.com/uploads/1/3/0/7/130739038/7576058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_600de91d6906e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487623/normal_60236b979f014.pdfIn PDF document text
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/zuburisekifugezuxiwu.pdfIn PDF document text
    • https://wigimosasalak.weebly.com/uploads/1/3/2/8/132814057/7305091.pdfIn PDF document text
    • http://flathead.us/pipubikiu8car.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384459/normal_5ffe8e189f4b7.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://s3.amazonaws.com/bupijila/7552505519.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/backup_android_contacts_without_screen.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/have_got_worksheet_macmillan.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/cisco_nexus_3048_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/50330489523.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_off0000d41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41A 4992 bytes
SHA-256: 5c308a7ec86141d865f4be75af67c6e2020aeea52c140800573215f7a1a7e31f
font_01_sfnt_off0000e4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EC 10700 bytes
SHA-256: b33c0cb8cb6bb0dec349c210a16437afcd2f17ddb919dcb312d14f785e1231f3
font_02_sfnt_off000109a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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