Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6c3ddd8e4a2949…

MALICIOUS

PDF

73.0 KB Created: 2021-03-10 17:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 8c296c9f9e23e8f335c4867cd51b46b5 SHA-1: 9832543e21d10235b3241c859ba3038e79f4877b SHA-256: 1e6c3ddd8e4a2949e84368904e8dcb7a4ea11e30c83f7a27f7f0679b1455c930
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and potentially malicious redirection. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=plant+sexual+reproduction+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464542/normal_6002e8a1aa59a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369317/normal_5fe315c639bd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501770/normal_5fde6f339acbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_603731bc105a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_602eb65660919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463559/normal_60214d2c81927.pdfIn PDF document text
    • http://blacklaser.ru/tizetuxonuruzofh32r.pdfIn PDF document text
    • http://werenntaq.online/ocr_gcse_maths_past_papers_answersqv6dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475874/normal_6029b50b6eb2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_5fe875933f4a4.pdfIn PDF document text
    • http://onlineeshop24.xyz/gosefuxdonz1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378164/normal_5fcdc39712c1a.pdfIn PDF document text
    • http://20970907.net/lemuramasegapa51dbt.pdfIn PDF document text
    • http://futup.ru/what_does_the_woods_symbolize_in_a_midsummer_nights_dreamlivgt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413474/normal_6036bfee62215.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455894/normal_5fcb48acede46.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_85c1163a52914a94a12f32a4a511af59.pdf?index=trueIn PDF document text
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_1f6d77f2dd1f432e8c07db336106b058.pdf?index=trueIn PDF document text
    • http://rivudokuji.rf.gd/bebaginuxibarejag.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_895569a9cc294e88a5b500f3a9665ad3.pdf?index=trueIn PDF document text
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_98226fc78f454a4d9365ffedb7dac638.pdf?index=trueIn PDF document text
    • https://d7179dab-c972-4501-9f4a-16044ca71e84.filesusr.com/ugd/434f74_cbe191b5574a49fca9ea001eea5e4afa.pdf?index=trueIn PDF document text
    • http://darajakejaxise.rf.gd/78823105817.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_off0000e091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE091 5384 bytes
SHA-256: ce2eee5367d89318ba7d5e4fc75aced6da72542a855eeaa08bc4e1a1cf92c3a9
font_01_sfnt_off0000f2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 10412 bytes
SHA-256: d25ea0b79eda9060889d691f26f752f6d985f50d552e8a7b07be0ae251579b39

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