Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14d2fc5b7bbdb29…

MALICIOUS

PDF

197.0 KB Created: 2021-03-17 18:47:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1a8ec615e878913308234ecf1fc27992 SHA-1: 74c347fe2431df9d624b3f90b0465bb6b1fded1a SHA-256: d14d2fc5b7bbdb29bd2f5f5b4045d1cf676fe5deb2e38048953f3b14660368fb
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Karl Marx theory pdf' and mentions wkhtmltopdf, suggesting it was generated programmatically to host the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/award?keyword=karl+marx+theory+pdf PDF link annotation
    • http://kolagozisil.mywebcommunity.org/22990351976.pdfIn PDF document text
    • http://melidagerukebel.sportsontheweb.net/31145740330.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/anatomy_and_physiology_coloring_workbook_9th_edition.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/48f1a9e8-b7af-4c8b-9607-3c84183f6abf/zuwepatifikibuxavedi.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/41228245115.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_550d68b1e38442d9866b2cd90296dbd6.pdf?index=trueIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_26270aa97eb343eb9b59a3d7b6b5717e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fcd1b5d-be38-4f93-b3ec-51505c6d361b/bersa_model_380_price.pdfIn PDF document text
    • https://67dc9804-4028-4298-afd7-d431d2c16fe6.filesusr.com/ugd/559c84_da4e0703e16d457fab5c21905f514ff2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/best_low_voltage_led_pathway_lights.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/castlevania_gba_roms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/456abeeb-083d-4656-a78c-0f569c54d61f/93321709515.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_8513e4d75f804b90b2ac1b7f6f4847bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/fifa_score_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/joduv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e405c6f-d6b4-4dda-80dd-db8793790b63/3852644058.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/python_programming_book_in_hindi.pdfIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_2bfb2b3d775c490a88f411d0760930e7.pdf?index=trueIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_6dc6026fcaea4aab888d9dbfe662001c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/847c8ee5-cf3d-43d0-8e9d-c5b8541eac45/dd_2nd_level_wizard_spells.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_off0002c717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C717 5244 bytes
SHA-256: 4d04085c275bace5eed17ca348a41becdf6718746f03e9166c4e82fd2e927125
font_01_sfnt_off0002d8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8D6 14208 bytes
SHA-256: 38d152c6f501cb72e8f0f7c3daf7ceb3af6d947058d5746e2c4f8bb9ae1f8ae4

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