Malicious PDF — malware analysis report

Static analysis result for SHA-256 cffa8f99db852ce6…

MALICIOUS

PDF

73.3 KB Created: 2021-03-25 13:09:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ca37cae1d20987290508f48670bff61c SHA-1: ec17b089c20f7d94959b1d36885dd6d341f88536 SHA-256: cffa8f99db852ce6e89909323fb15f20f0b99aa1ca4d126acba458eb16f2053f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with text related to finding a child in foster care. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest it's designed to redirect users to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/strik?utm_term=how+to+find+a+child+in+foster+care+california In PDF document text
    • http://fruct.space/32238195653upxjg.pdfIn PDF document text
    • http://apple-fruit.space/ninja_blender_green_smoothie_recipes8aq4a.pdfIn PDF document text
    • http://imkl-checker.com/basic_doctrine_of_christianitys8aso.pdfIn PDF document text
    • http://itfamily.pro/28813676960lnsd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405929/normal_5ff92bd7a7dae.pdfIn PDF document text
    • https://nonadokemiraf.weebly.com/uploads/1/3/0/9/130969568/9784811.pdfIn PDF document text
    • http://koolmaxt.online/how_to_identify_diode_value31blx.pdfIn PDF document text
    • https://ponirusorigimo.weebly.com/uploads/1/3/0/7/130738629/soxuxevudoki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389830/normal_5fcd6f130e0ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wevopik.rf.gd/59582338740.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/retega.pdfIn PDF document text
    • http://kimatun.epizy.com/pupakaxepebibofiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e5d039-6927-4c05-bffc-5eeb63dc784c/rhetorical_devices_in_i_have_a_dream_prezi.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/excel_urgent_care_nesconset_portal.pdfIn PDF document text
    • http://webimonok.epizy.com/20758882012.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/reflection_and_refraction_worksheet_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/16921813532.pdfIn PDF document text
    • http://sejokuze.rf.gd/in_praise_of_shadows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d75ce007-676f-4693-bcd7-57b23b4cc549/sokubovanipalopaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/bulgur_wheat_nutritional_information.pdfIn PDF document text
    • http://filamejukak.epizy.com/amba_shambhavi_ringtone.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_off0000e185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE185 5160 bytes
SHA-256: e128d375e273a22972ffe5686331193981dac7cab07bd20c36190aaa7794d704
font_01_sfnt_off0000f31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31F 10856 bytes
SHA-256: c800d095a20835847f8f753bf47aaf2ef325b6fb0205027b56206028808a2a5e

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