Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b1ef1be8ae73e6…

MALICIOUS

PDF

111.9 KB Created: 2021-03-20 02:25:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6923e1b366542aa8fefd0f9d5c4151c5 SHA-1: d932a2a888140a3176079a5e2b81cb2e7658cec1 SHA-256: 30b1ef1be8ae73e6a61a85c0a51223177f9163805063e373747a88046eccdbb3
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=pacxon+unblocked+game+world
    • https://bafibosu.weebly.com/uploads/1/3/0/7/130738803/2862431.pdf
    • https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/5e85daa3567.pdf
    • http://timelessdecorum.com/40068909273y9183.pdf
    • http://pewusimirunoto.22web.org/samsung_remote_wont_work_with_sonos.pdf
    • http://pusatokolerax.mywebcommunity.org/xakuzufopo.pdf
    • http://saudiautoinsurance.com/86700657970yrxp9.pdf
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/968750bb4033b31.pdf
    • http://kogutojoveso.mywebcommunity.org/contabilidad_de_costos_significado_en_espaol.pdf
    • http://xapepinozex.22web.org/leonardo_da_vinci_biography_reading_comprehension_worksheet.pdf
    • http://dokaxirugik.medianewsonline.com/understanding_the_queen_s_gambit_accepted.pdf
    • http://totaxusozavu.sportsontheweb.net/rolasisowafemux.pdf
    • https://xalakadumikimam.weebly.com/uploads/1/3/1/4/131437423/1dca49.pdf
    • https://kakerenu.weebly.com/uploads/1/3/1/0/131071145/zugezabubo.pdf
    • http://zawuruliwisevo.iblogger.org/90942498906.pdf
    • https://pelosewedi.weebly.com/uploads/1/3/4/7/134753512/fedef.pdf
    • http://zumewidife.mygamesonline.org/64769043022.pdf
    • https://salofapaj.weebly.com/uploads/1/3/4/3/134314320/zirupe-fikojejutil.pdf
    • http://sesalon.xyz/critical_incident_report_definitionaoe2g.pdf
    • http://fajujefa.getenjoyment.net/zixerufewef.pdf
    • https://zixojubagever.weebly.com/uploads/1/3/4/6/134613499/532184.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://melamepapate.rf.gd/building_information_modelling_wiki_fr.pdf
    • http://waxetip.rf.gd/scratch_2._0_offline_editor_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ddc.bin
23716ba4a5bb9fa9784ae22ae804e68ca5b525c3cf40d91df7a57b356f0d8e16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDC 15880 bytes
font_01_sfnt_off000160fa.bin
bd8c88191b186450d3ef90cf23c1dc1dcd864a6dd0bf8a6f9c8d0b50dff3a217		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160FA 5444 bytes
font_02_sfnt_off0001737e.bin
ca93ca47924527b9597726a21f6828f80e87f8700d064324e82072fc916ebce3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1737E 12024 bytes
font_03_sfnt_off00019cbe.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19CBE 16036 bytes

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