Malicious PDF — malware analysis report

Static analysis result for SHA-256 378b1903645a9f20…

MALICIOUS

PDF

72.6 KB Created: 2020-12-25 04:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5ccf129621ce8044f2621217b5e4a27b SHA-1: 4cc9566c52e3f88e2b8ecc4cd546b0eedeb16377 SHA-256: 378b1903645a9f20bec127540e635c568028991f99a3ac3d5aaacf62e340a14f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a download page, disguised as a game. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of an external URI points towards an attempt to redirect the user to a malicious 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
  • 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://traffset.ru/strik?utm_term=jake+adventure+super+pirate+world+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502436/normal_5fdc1cce80cb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412896/normal_5fe5108dca4d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_5f98edcf54f5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423700/normal_5fc947d629fc3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9a57308-4d65-402f-9a3c-21ba532c6354/40648434495.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/warcraft_2_movie_tamil_dubbed_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/seed_starter_kit_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cccf7528-2fe1-4f94-be89-db1571cb4138/61641999796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996dbb54-7787-4bd1-ad68-4a1aa472d4dd/momoiro_clover_z_anime_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/contra_dance_steps.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/fpse_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/introductory_chemistry_5th_edition_russo_silver_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c34b808-9760-41ea-bfd8-dc4fdfc757d5/72405692677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef2867da-891c-45a6-af5e-866b138d1633/benofozil.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/how_to_unblock_number_on_samsung_android.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_off0000c939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC939 5156 bytes
SHA-256: 967629264b1499f06c9935e96c58b5859f923aa2e5e495c04b5800bbfe472ceb
font_01_sfnt_off0000daeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEB 9788 bytes
SHA-256: 322a97d0d6095da8def850912d555759b1e9b72a29854bcc6e09dd6591e4ba77
font_02_sfnt_off0000fcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 17036 bytes
SHA-256: e7b5ac3b55905a41798c887e46363af0b703af4a6dbd6c12e73ba5822639781d

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