Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bce8bd5847c2e5…

MALICIOUS

PDF

77.2 KB Created: 2021-04-02 16:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: eb6ae21db8ec4cd2042f3c8fed8ffcd1 SHA-1: 1f7602403a08f554f3ca65749fee4e8a1ebbbbcf SHA-256: 75bce8bd5847c2e5acfe19c38a8077f72415206d11599dcbca9900332d250454
156 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a large number of external links, potentially for SEO manipulation or to host further malicious content. The document body, though heavily obfuscated, contains text related to 'ustvnow apk fire stick', suggesting a lure for users seeking this software. The presence of external URIs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/wix?keyword=ustvnow+apk+fire+stick PDF link annotation
    • http://salizurewaki.mypressonline.com/simpson_3200_pressure_washer_pump_parts.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/dogosofanawofojukoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/merisipugito/jgYgf78/detewetojakagixol.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/iiNCs4I/53114733217.pdfIn PDF document text
    • http://xusakarezexalu.iblogger.org/dakoxunudep.pdfIn PDF document text
    • http://xatakafigudu.getenjoyment.net/70832753203.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/ihiYhh9/batman_world_burn_quote.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/v86gfhc/loxakikawebadof.pdfIn PDF document text
    • http://popibiku.22web.org/sidupipezadarer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pibuluxe.rf.gd/xevesupusekodamitaxad.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/68330090495.pdfIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_2f3a0624ee9e47e5b59c3ae6b5728b97.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wozoxub/ginasogajojufox.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/emotional_health_worksheet.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_c01cedc554f94815bddc5bd94851259c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luborinizu/tipos_de_comunicacion_en_una_empresa_turistica.pdfIn PDF document text
    • http://suboxasolu.rf.gd/export_swagger_documentation_to.pdfIn PDF document text
    • http://lurarapekakaka.atwebpages.com/lamiaceae_family_plants.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/75730599626.pdfIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_f7daa1eae8b142278f0ac6592d977ad2.pdf?index=trueIn 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_off0000f02f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02F 5184 bytes
SHA-256: 94c475530fe47afd46e624297c819c4802d374e6e6d6d63475f19763caf71861
font_01_sfnt_off00010206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 10520 bytes
SHA-256: fbc7e15020f88f4f97940a13b57c7018f19a954892bb1637f76ca27fdf835202

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