Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1cf4f82eaf0d04…

MALICIOUS

PDF

82.8 KB Created: 2021-02-27 03:16:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 017e3e36f9241cbd302f4035f34ea758 SHA-1: a7fd7fe1cf1c763d5e7381dd1b34e3f34be2f63d SHA-256: 1a1cf4f82eaf0d041606a3af00b2115e0b3f2a88692e2e1e37747855b3f7e144
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of the external URI suggests the document is designed to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

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://kuzutuzo.ru/aws?utm_term=baby+bjorn+bouncer+replacement+parts PDF link annotation
    • http://nomanodix.iblogger.org/construction_master_pro_calculator_app_for_android.pdfIn PDF document text
    • http://wisecredit.info/best_answer_introduce_yourself_job_interview8z6jv.pdfIn PDF document text
    • http://zootime.store/beats_solo_3_wireless_price_in_pakistanh2w29.pdfIn PDF document text
    • http://chambrehub.xyz/xudelijorozibowofojpf0xd.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/ibgdHhj/60914575867.pdfIn PDF document text
    • http://tixshopclub.fun/99967299659kmots.pdfIn PDF document text
    • http://reduslimitaly-official.website/xuxetiwakikuduvagucbazt.pdfIn PDF document text
    • http://udilische.club/pdf_reading_comprehension_with_questions_and_answersca59p.pdfIn PDF document text
    • http://lizetadolanut.iblogger.org/81098947871.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/tozaduliwubega/liftmaster_8365w-267_manual.pdfIn PDF document text
    • http://buxamojajowolos.rf.gd/listening_skills_colouring_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/tesat.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/manualidades_con_papel_aluminio_reciclado.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/75800349711.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/bofevarasaku.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/where_the_wild_things_are_book_with_pictures.pdfIn PDF document text
    • http://vupifokixen.rf.gd/hoover_windtunnel_vacuum_replacement_hose.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/28_day_banting_diet_plan.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011d22.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11D22 20212 bytes
SHA-256: 80248ea6b99b430745824fe61d87daa3c24ddfa1bc66fdb65ac01984051bca6c
font_00_sfnt_off0000e2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AF 5448 bytes
SHA-256: 2844160d83b8d52360c02de5f6617cc69ef621aa37fcd6aee9107db8d4ea367f
font_01_sfnt_off0000f523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 11936 bytes
SHA-256: 223a9483202917c7fb83f560da70f37d2b36b357c0d6bc2961ea921c8b053e52

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