Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29da767f5c46218…

MALICIOUS

PDF

76.7 KB Created: 2021-03-29 20:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e7755882111505d5b379ab96329727e2 SHA-1: 2e0fba32365e918495b56c2167eeb1fc5c423152 SHA-256: b29da767f5c462182511eb9345902035c71fd0bf60b94231eac5da1678b78e69
156 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 ClamAV and 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 0.9995

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
  • 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://zajinet.ru/123?utm_term=place+value+worksheets+up+to+hundred+thousands PDF link annotation
    • https://benanuvez.weebly.com/uploads/1/3/0/8/130813453/megesadokuwoki_toratonof.pdfIn PDF document text
    • http://geosen.net/23949725988b8qv2.pdfIn PDF document text
    • http://apelsins.space/72539073453dycwn.pdfIn PDF document text
    • http://fakaripeti.xyz/point_of_view_writing_prompts_2nd_graden260d.pdfIn PDF document text
    • https://tejifogigevavep.weebly.com/uploads/1/3/4/6/134675995/fejekijiser_pivapoxobikixu_nebesurobeluli.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/25d2fe2d-d67e-4560-8864-92c97ce53d91/89266701965.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/93692745040.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_ec1a75ebba7746acab0e439243268c94.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ba0841-0e53-4a0d-9317-514bb565908a/kowirinap.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/37885945380.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/ashton_drake_reviews.pdfIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_37b3212edb69461385568172b61ee363.pdf?index=trueIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_9fc4c0867433454a8c383ed87e5bf49e.pdf?index=trueIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_9a174926934c4445a4caafe710f5e6ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/2347165214.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/70958597000.pdfIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_e91c1de579db4b3b86e6069f49987b8f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vutame/30221224489.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/30558727403.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/bound_by_flame_ps3_trophy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759e41f2-0cc2-4423-a7e4-952144b5ef37/philip_kotler_marketing_management_15th_edition_download.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_off0000efdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDF 5376 bytes
SHA-256: f081a6b6de31d670f1c2c77575fbbe4b5881b6f776753eec5e95b253c73a092d
font_01_sfnt_off00010236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10236 10120 bytes
SHA-256: d7b3ec54cf23c87ce49b733cbe2bc09ca5479a7997267d099ad48290c0451972

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