Malicious PDF — malware analysis report

Static analysis result for SHA-256 b933b5b40fe4e6e2…

MALICIOUS

PDF

70.7 KB Created: 2021-03-01 17:25:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b4b68162547983e01d136473151380cd SHA-1: 013264ba23364bef1117127e4fffcd212935d3eb SHA-256: b933b5b40fe4e6e23f7a13eb7431e25e65db37166ec066403b0715f0b95b304c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a site offering 'miracle nikki mod apk unlimited money', suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and the nature of the URL strongly suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://zajinet.ru/wix?keyword=miracle+nikki+mod+apk+unlimited+money PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5fda656ba53a2.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/QhhJBrE/dragon_wars_movie_review.pdfIn PDF document text
    • http://zodelem.mygamesonline.org/how_do_you_reset_a_honeywell_thermostat.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/wVjgXVj/lecture_notes_app_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xijodepub/hijbmjh/62851851414.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/jghagcM/59351776254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368479/normal_6023e0420fb8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_6034568e624d0.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/kodipopujufipig/game_dead_or_alive_4_pc.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_off0000d769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD769 5212 bytes
SHA-256: 0128b23aee368e79a7a82c11d7f506c5a815a645e62bb437ab6671a185555aac
font_01_sfnt_off0000e920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE920 10732 bytes
SHA-256: ade4d34caad657b83f2c8e5cd20f5fbbffc154e1a388c621b1c3b41affdf3b14

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