Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce05296d2548d4f8…

MALICIOUS

PDF

70.9 KB Created: 2021-03-21 01:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2c3360befff6356f56182e858a87d45e SHA-1: 74523c24e6df977581e6678034e2713f66a7f1ed SHA-256: ce05296d2548d4f84b93c78ab4ec4ec784040acdd307db35d982b5e1eb3ca806
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://fokemale.ru/123?utm_term=sap+tcode+for+costing+sheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408713/normal_5fcbc962b914e.pdfIn PDF document text
    • https://vivazezege.weebly.com/uploads/1/3/4/0/134041722/sesekidakuxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_5fdabe9857a8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_601b1847e8fb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448986/normal_60361276a7d99.pdfIn PDF document text
    • https://najusijas.weebly.com/uploads/1/3/5/4/135400897/fenowew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_b0eea86610ce428bb9c60964f8cc9015.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nagudo/ansoff_matrix_ppt_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5007cbf8-4e6d-415b-8fce-17430f262b2c/skyline_koala_travel_trailers_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a091b5-d81b-41a0-b3e6-27931e938028/74076862146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/178f82b9-9cff-4cb5-91d4-5499aeb49878/wobelolafatelij.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/2017_chevrolet_suburban_lt_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/polaroid_onestep_600.pdfIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_4d744b57418e4086b63349aa7dfbe58b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/wiguzeripasojolowokosid.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_97af9da2aa2949ed81228f78feea60e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c2f62d-4d73-463d-8307-7676917850fe/speed_queen_stackable_washer_and_dryer_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/20786151355.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/ralph_grimaldi_discrete_and_combinatorial_mathematics_5th_edition.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_off0000d822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD822 5488 bytes
SHA-256: 438012924527258827344c6e81106d3ea6d3c434e589078225cb7b86cd7d47b4
font_01_sfnt_off0000eac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC7 10452 bytes
SHA-256: d1a8e0d5a53840fea15d31ebad1ad23aacf862f0e7056aa4f988714591b66d48

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