Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e74d84728bcdec4…

MALICIOUS

PDF

35.9 KB Created: 2020-10-28 23:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 529dfec5cf3a76a0d6770b96845faa92 SHA-1: 0446e7c4504ecde365349e31ed59491ac18caa97 SHA-256: 2e74d84728bcdec4cc8a16a4844bc1d0e4efd315eb738b047d1199cf386da1fb
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/aws?keyword=nations+ford+high+school+graduation+2019 In PDF document text
    • https://paripipedaninez.weebly.com/uploads/1/3/4/4/134444050/tuxesefagumuwo.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/6556261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f89e50d60ca2.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/2379642.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/6d32dc0ce6ad.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/favodepoti_lorobepovanid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f8d1d3849a99.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/gadewumeja_gitowakirefo.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/4582187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_5f8c73cb143fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f899e246f298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f870473c9663.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/09b03b.pdfIn PDF document text
    • https://latudawa.weebly.com/uploads/1/3/4/3/134308630/9996790.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005080.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005080.bin)
    • https://s3.amazonaws.com/mipeboro/showbox_official_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/bepemisegebajotov.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/statistical_quality_control_m_mahajan_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/krishna_yajur_veda_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/medical_certificate_form_1.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/ambientes_de_aprendizaje_segun_autores.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/new_amendment_in_motor_vehicle_act_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/81899764827.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/sujom.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/jitutomuzotademokuzojilun.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/different_types_of_cells_in_biology.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/animal_farm_final_test.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 extracted file (font_00_sfnt_off00005080.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5080 5732 bytes
SHA-256: 85f8015773ce349724c3182740fdfb498403fd0ccd784d7ead67b990a043e106
font_01_sfnt_off0000640d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640D 8892 bytes
SHA-256: 8e98a60dfc9b27149e874a8e92bc6481d7f1a0d548df461373d9305972d49219