Malicious PDF — malware analysis report

Static analysis result for SHA-256 70cba5de0259d3e5…

MALICIOUS

PDF

78.9 KB Created: 2021-02-20 13:45:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a9c7cedffbccfaf8d4451e6a579ec544 SHA-1: c2fe0135a2320c98e63dbbea7b7cd36dfc218496 SHA-256: 70cba5de0259d3e5d1efbfc31aa9589fb4e3225137e52cf4c7081279f57331ab
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://crophysi.ru/123?utm_term=army+pt+standards+push+ups In PDF document text
    • https://cdn.sqhk.co/zefafulolit/fGTpfcg/zipexasegoturodegama.pdfIn PDF document text
    • http://ravitidi.22web.org/30835093873.pdfIn PDF document text
    • http://nasporte1.fun/arbitration_and_conciliation_amendment_act_2016atvmc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450512/normal_5fd39509e9557.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/gbjg8fT/boom_beach_wiki_tank.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/igEdheJ/mudding_and_taping_drywall_cost.pdfIn PDF document text
    • http://newowoliso.iblogger.org/functional_python_programming_steven_lott.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/ffhaNz4/voice_assistant_settings_gesture.pdfIn PDF document text
    • http://specialsale.info/kowakozawerunokonedabidibslgxb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383703/normal_5fecc4efb0713.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fofeguj/zidukulurazikagitawi.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/darava.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/heterogeneous_catalysis_in_industrial_practice_satterfield.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/62215611600.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/free_memorex_cd_label_maker_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/wwe_monday_night_raw_bleacher_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/64279260322.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/directory_website_template_wordpress.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65F 5260 bytes
SHA-256: 6ca2c3a8f0185924836a92acabbe88ca2b0e564cc1e8d490bb9cdc84b3757585
font_01_sfnt_off00010817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10817 10764 bytes
SHA-256: 7704d99a9e5c9c45a8013a36230e6ffb8ce1d692c26690e6b54ec24b0fd3688a

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