Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc3e30e108d5bf9…

MALICIOUS

PDF

77.6 KB Created: 2021-03-06 15:12:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 9b2e174acd4a8d86e36f17bc57931613 SHA-1: 995257bd0b9bba65023c4ad7cf98250f1024152d SHA-256: 6cc3e30e108d5bf960519c574e35f9d9012fc06cd9cfbe3a466fc3302d1df447
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains and are likely part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The embedded JavaScript is likely used to facilitate redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pelibifir.ru/wix?keyword=good+life+rv+resort+facebook PDF link annotation
    • http://pomirkapa.site/emathinstruction_algebra_1_unit_6_answer_key50mu9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494431/normal_6035f8e84e284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420599/normal_6026eca359777.pdfIn PDF document text
    • http://about-central.com/dazevalezonotq1hqo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389797/normal_5ffd2a6dc12a4.pdfIn PDF document text
    • http://strgb2.ru/490479995282fng0.pdfIn PDF document text
    • http://lepasipun.iblogger.org/what_is_the_set_button_on_the_traxxas_transmitter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501042/normal_5fe2036c2ce59.pdfIn PDF document text
    • http://vinnipoh.fun/peloximumalodutoji0vuvl.pdfIn PDF document text
    • http://titanovyi-filtr.ru/kitchenaid_food_processor_reviews_7_cupff79o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460694/normal_603e7f2eb6d38.pdfIn PDF document text
    • http://siankaanmexico.com/kogofelipajp4s7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_602a7e55bc439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495988/normal_601dbd1d8d1f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sikitoda.rf.gd/backtrack_5r3_free.pdfIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_1c9f6d2ff3dd4312b9184905d66b6a05.pdf?index=trueIn PDF document text
    • http://nevejekegasa.epizy.com/sort_healthy_and_unhealthy_foods_worksheets.pdfIn PDF document text
    • http://dejamatokato.rf.gd/kupixolagujizofovegovo.pdfIn PDF document text
    • http://jefitotirezakif.epizy.com/80430778102.pdfIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_7879b695bfbc4fe5abe2496df45ab80d.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_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 5312 bytes
SHA-256: e83be71c66910a5dd4fa50e6ffeaad21bc2bbe0da65b9e56823d176577030af7
font_01_sfnt_off0001042b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042B 10916 bytes
SHA-256: e6edfc58d0a5bda9f542e9462dc3005e090e0a20a0eefb210a090c0ac4f9c35f

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