Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82adce8dbcb40c9…

MALICIOUS

PDF

85.1 KB Created: 2021-01-25 09:54:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 897891a6d30463dc5b6b163f51017206 SHA-1: fcc1b37bd190a4775e51558e320f7c4af823ebe6 SHA-256: b82adce8dbcb40c9e7d4d7558e0ed30554ac0ab737fb8e4389268822dabe3275
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO spam. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=molar+mass+of+co3n2 PDF link annotation
    • https://cdn.sqhk.co/momujolo/D9jggjk/bibomidenizobudulufokabok.pdfIn PDF document text
    • https://cdn.sqhk.co/vujejanar/hGiihaR/37150024150.pdfIn PDF document text
    • http://vetodegaro.22web.org/email_etiquette_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/rodisukipi/iaPnjap/tunudaxurewepeni.pdfIn PDF document text
    • https://cdn.sqhk.co/worupageke/Jn0jbjf/vexado.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/j3DUgh3/tower_clash_royale.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/sojikomazovo.pdfIn PDF document text
    • https://fumewalifo.weebly.com/uploads/1/3/4/8/134884483/buwemizi-vefetu.pdfIn PDF document text
    • http://dusosax.66ghz.com/google_forms_allow_multiple_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vedibovejixi.epizy.com/dog_days_are_over_drum_sheet_music.pdfIn PDF document text
    • http://fibilizovowudux.epizy.com/puvavaleviwuzutevatejapi.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/42314768026.pdfIn PDF document text
    • http://rowomasogig.epizy.com/piziwixaviwopu.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/parametrik_ve_parametrik_olmayan_testler.pdfIn PDF document text
    • http://pasexojubil.epizy.com/eicr_template.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/3385771509.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/bluetooth_devices_windows_7_free.pdfIn PDF document text
    • http://beninoduvewer.epizy.com/bunafiteduwuwat.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/15798888775.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/jaani_dushman_2002_full_movie_3gp.pdfIn PDF document text
    • http://tuxizowivu.rf.gd/59877389717.pdfIn PDF document text
    • http://gukupexokopiwug.epizy.com/openfoam_guide_v6.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_off0000dfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEA 4872 bytes
SHA-256: 5601885b990f6f0f7506a187e163f91502e2a9c93a1d386fefbc54b9aef37af2
font_01_sfnt_off0000f04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04D 16436 bytes
SHA-256: 4fc4618401a86091b23c051380e6551fc4f88795260edf6929e8ce0aff91a471
font_02_sfnt_off0001242a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242A 16088 bytes
SHA-256: 482b7b4fee51162e6a5d82ff10b0db2f6da6482a74a1be5a66137bb6d850bf40
font_03_sfnt_off000138e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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