Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccae59f7cd7e74eb…

MALICIOUS

PDF

79.9 KB Created: 2021-02-21 03:09:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 64c19c6123ffb9a4e292b66c5938bdf4 SHA-1: 55c637ebcaab70c317bee565beb1afd899b2a663 SHA-256: ccae59f7cd7e74ebc31c2e3831689b58b2939edd8093cbe8caadaffe50825395
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifier indicated high maliciousness. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The presence of these links suggests an attempt to direct users to malicious sites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wb?keyword=ribhu%20gita%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452618/normal_5ffccee10a654.pdfIn PDF document text
    • http://pocki.top/mowaxebimomobubobazbdvi9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469105/normal_6029fcbae20a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475741/normal_600121197104a.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/dropwizard_metrics_consolereporter06k22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494891/normal_5ff0267f6c9af.pdfIn PDF document text
    • https://kivinogafuwej.weebly.com/uploads/1/3/4/7/134702495/sobuwokijakavu-danoginitugage-rokoputaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450898/normal_60177c698baf8.pdfIn PDF document text
    • http://reduslim-ufficiale.website/manual_do_drone_e58_em_portugus46mh2.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/how_much_money_is_prince_george_worthfn6mh.pdfIn PDF document text
    • http://dkmz2.club/boond_boond_roy_audio_song3b0bp.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/jfiajiQ/qr_barcode_reader.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://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/android_pie_galaxy_s8_plus_xda.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/graph_exponential_and_logarithmic_functions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/sejivufalaxatisaziwilenip.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD7 4692 bytes
SHA-256: 0c91238d04ac663aaf439e1dc42fd32fe1c762b73f20ae9a8a4772b869609dc7
font_01_sfnt_off0000ecd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD6 13672 bytes
SHA-256: acba2d1da70e4c59ab29d759f564d6a6c233ea5ef0e4320310df8b6f1900653a
font_02_sfnt_off00011460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11460 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
font_03_sfnt_off00012261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12261 4296 bytes
SHA-256: 286ec3f5134ae83fc4a9f4be59583d0ce1b7f83b025db1d702cb91244075c7c6

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