Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7506dfd176a316d…

MALICIOUS

PDF

76.1 KB Created: 2021-01-04 21:29:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 304997df7bd32a0f5c64688d687becf2 SHA-1: ee8ead4df2e991cc573ecf2ebcd5086169140069 SHA-256: a7506dfd176a316d8d7dc85611f951673696888cc2e1c45d0dc769a8dbdb4b30
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123'. This, combined with ML classification and ClamAV detection, strongly indicates malicious intent. The document body, though heavily obfuscated, contains text related to 'essential oils desk reference pdf', suggesting a lure to disguise the malicious link. No scripts were extracted, but the presence of a malicious URL is the primary indicator of compromise.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/123?utm_term=essential+oils+desk+reference+4th+edition+pdf In PDF document text
    • https://dasowafajego.weebly.com/uploads/1/3/4/7/134723411/pozojawegirolo_nafepurusig_lavudix_vimevemo.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/DIhijjD/dunkin_donuts_charli_drink_nutrition.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/fDicfif/real_crickettm_20_android.pdfIn PDF document text
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/9845668.pdfIn PDF document text
    • https://guxipalun.weebly.com/uploads/1/3/1/8/131857363/nabegevonibixun_fatidufunew.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/paropabaru/24699625308.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/tunein_radio_apk_full.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/druid_leveling_guide_eq_p99.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/kinetic_energy_definition_for_kids.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/44868747436.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/1999_bmw_528i_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/google_apps_script_tutorial.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_off0000ed54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 5352 bytes
SHA-256: 6303c6cfa051b9d57057ace716bb70332ae5640118ed303dc27feb9b9de702ae
font_01_sfnt_off0000ff8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8C 10624 bytes
SHA-256: e603668a2cc0f247d08b3f3fc9a251d33981f8953edabecf0e5b96b41b2f38a7

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