Malicious PDF — malware analysis report

Static analysis result for SHA-256 983bd47609fc47f9…

MALICIOUS

PDF

76.9 KB Created: 2021-03-31 01:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1eb25abd27d5f23c5760121d5ca4323e SHA-1: a7e07f714d59faa19a39cac468db3e371bedc790 SHA-256: 983bd47609fc47f9944d13f0308288866c41fe1d254f550b148d65fb847ddae0
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search engine result, likely intended to trick the user into clicking it. ClamAV and ML classifiers strongly indicate maliciousness, and the PDF_URI heuristic confirms the presence of an external link. The document body is heavily obfuscated, preventing a detailed analysis of its specific content or intent beyond the presence of the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/strik?utm_term=how+long+do+ring+doorbell+batteries+last PDF link annotation
    • https://cdn.sqhk.co/dolitife/jojdhbl/the_joker_hd_wallpaper_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/4Fjbdv6/rilutivisasojeba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473616/normal_6026a47b7b75a.pdfIn PDF document text
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/1ed24f0957b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_602463cd53b3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401994/normal_6059bb2d085e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446158/normal_5fd99c295ec84.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/j3Aia0R/20885090054.pdfIn PDF document text
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/sapupuvupumupen.pdfIn PDF document text
    • https://kudarori.weebly.com/uploads/1/3/5/9/135960502/titakidapil-raxipakusidifil-zuluzusirivu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_a6d04f1613de4f5baf0620eb86807c58.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/17543f0c-1197-4c57-aa33-529288744cb4/fl_studio_plugins_pack_rar.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/wibazikumonaxowik.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/critique_of_everyday_life_wikipedia.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_04cba90d05994567bfb426df231a24b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2457c16-676c-4844-9c29-8595c78dd32a/mawugivokisoloripede.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/bakra_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/nafekibaxojobix.pdfIn PDF document text
    • https://b147a2f3-58af-4013-9def-597e86e94513.filesusr.com/ugd/47d6bb_8a07a2f12363452fae50f2c3ad52b001.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/18288911056.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_off0000f14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14B 5188 bytes
SHA-256: c20bfd03c9d7fedba12b9458d8c843886f906eca4270829b8271ff164adec537
font_01_sfnt_off0001030d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030D 10356 bytes
SHA-256: ba5f9c04b76b81a252dfbf8c20b521da044321a384002919205754b23a85bd6f

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