Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cbcc78142f29a4…

MALICIOUS

PDF

40.9 KB Created: 2020-10-26 06:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 1db252c9c8789ecfb423da0739d7744f SHA-1: 8bb24c09469e50c9d7ca892212de6b2fd0608de0 SHA-256: e7cbcc78142f29a47c4c7c5dd2062ec888753f779ddf395b95f54ea341ee80c7
184 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.
  • 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.
  • 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=ceh+certified+ethical+hacker+book+pdf In PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/6438900.pdfIn PDF document text
    • https://vaxeratomox.weebly.com/uploads/1/3/4/3/134397216/jaropopapa.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/sixukejomiwewanage.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/0c19b852f95d.pdfIn PDF document text
    • https://dowikonusinewe.weebly.com/uploads/1/3/4/3/134374018/xilejefez.pdfIn PDF document text
    • https://malinozibide.weebly.com/uploads/1/3/4/3/134380659/bumedavolafipigikefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5f8bf6e6b03b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410441/normal_5f93d6c67e5fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384647/normal_5f8d9a30d1725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f8c23588a6a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_5f90bb5270801.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000060bc.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000060bc.bin)
    • https://s3.amazonaws.com/batoragubukepo/approximation_and_estimation_in_mathematics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1337/6680/files/36266153062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3990/6718/files/26007792988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6530/2936/files/58380318397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3680/5800/files/planet_fitness_union_square_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5786/3592/files/cableado_estructurado_horizontal_y_vertical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/jolly_roger_bay_blast_to_the_stone_pillar.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_off000060bc.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BC 5172 bytes
SHA-256: f5fd84f2afcb83ee88d0f8fbfcba9ee9fc3f7810574ba4356257aa5a2af041a4
font_01_sfnt_off0000723f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723F 10672 bytes
SHA-256: 478766c99a7ab5b48a54ece207e6a23e2f608c508c1833c6e787f82ebe9b816f