Malicious PDF — malware analysis report

Static analysis result for SHA-256 696280a94321b688…

MALICIOUS

PDF

72.5 KB Created: 2021-01-12 08:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5d8527e1a877103676ed66d6831a8ba3 SHA-1: 7fe3b475300d1ee828c20a050d9ece61ac5f756e SHA-256: 696280a94321b688cfccbe695ba02f5c45f0ed0b0154d3417cc3c5de7ed4ae6d
214 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to 'Minecraft bedrock hacked client mobile', suggesting a lure for potentially illicit software. The presence of multiple PDF links and a critical heuristic firing for malicious redirectors indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/123?utm_term=minecraft+bedrock+hacked+client+mobile In PDF document text
    • https://site-1083588.mozfiles.com/files/1083588/goxadarurutowo.pdfIn PDF document text
    • https://site-1167947.mozfiles.com/files/1167947/wallpapers_hd_4k_pc.pdfIn PDF document text
    • https://bujubemido.weebly.com/uploads/1/3/0/7/130776032/3770901.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279107.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/bizamesuwepe/79609169568.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/today_s_date_in_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/xarixiwatitomijadavi.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/gugujusajoled.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/ronoxok.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/blouse_designs_2019_latest_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/se_bootloader_unlocking_v1._6.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85C 5292 bytes
SHA-256: 73d410c51aa52c97bd9152b416d63519f131a6065fb3bf30b247a138f22f75c1
font_01_sfnt_off0000da3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3D 10852 bytes
SHA-256: 732c411e3fd1bfacae350d6373e8c27ccf039f80cc7e3ffde4175ebfdf13c608
font_02_sfnt_off0000ff35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF35 16376 bytes
SHA-256: 684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36

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