Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb291db90f2aefa…

MALICIOUS

PDF

162.1 KB Created: 2020-12-26 09:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 688d158a3d8eb9c601b5b2355e1c9904 SHA-1: 2706b0c46bd84b3fa1cc9d94c6f09037c0a338f9 SHA-256: 9bb291db90f2aefa50c25e9757c7e3fa47bbfee79532539577ab76f252b3c8b0
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafffi.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains keywords related to 'hypoglycemia guidelines adults', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://trafffi.ru/aws?utm_term=hypoglycemia+guidelines+adults PDF link annotation
    • https://cdn.sqhk.co/tonuviwa/gjjUiaf/fan_games_fnaf_scratch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503525/normal_5fc552259c0ab.pdfIn PDF document text
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/d4050a7bcf.pdfIn PDF document text
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/b9a5a1d.pdfIn PDF document text
    • https://dekedenavit.weebly.com/uploads/1/3/4/6/134612093/327b82fa02.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/0aa91b24-1d17-4b1b-89e2-4a2e3b4a4086/kenmore_washer_80_series_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c9a2cba-d478-4b2e-8e2c-6ffa70291c25/42515016859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b773b49-aaee-4ba5-896d-17f187eaf2b9/v_model_vuex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc63dd91-8066-40e7-9d95-f35de40f046f/nagetosolizezabipix.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/biochemical_evidence_of_evolution_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/arduino_mega_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58c505a7-f854-45c1-bc90-8bdabfe3f66d/po_proceso_de_redaccion_del_nuevo_testamento.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/l_am_barbie_girl_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/staten_island_school_of_civic_leadership_r861.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21D47 3016 bytes
SHA-256: 97a1b257d0374fa318de267f46c0dc1ac3975f911ae519816f3a085cc6964dc1
font_01_sfnt_off0002280d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2280D 5360 bytes
SHA-256: 871e4f31f228dd2b8d3408b29501f115a69caf05b75c24d1bf330d73101a92d4
font_02_sfnt_off00023a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23A42 12492 bytes
SHA-256: a6518c610d1200c2fa359f45de546924e77543d301c91a21c8ce7e2670bb1610
font_03_sfnt_off0002641f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2641F 16460 bytes
SHA-256: 086f1b0f0764da3685b4ba2a745c56ba15c469e150629f28bbc55df1127f2c5e

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