Malicious PDF — malware analysis report

Static analysis result for SHA-256 3196aaddaaad746f…

MALICIOUS

PDF

79.8 KB Created: 2021-02-17 00:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 77b91d8ded852546c214d31b850e41d9 SHA-1: ce846f2d26d93c80ad321594340b16a34ad8ebe8 SHA-256: 3196aaddaaad746fcfec41bf0994e4ebdc98cfa781a5c6f37b4984d784d515e6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful sites. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or malicious content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/strik?utm_term=how+to+disconnect+a+hardwired+smoke+detector+uk PDF link annotation
    • http://sidumila.iblogger.org/65757885453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476146/normal_602c4286d0728.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/9914415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406191/normal_5fd77ae0a7ee6.pdfIn PDF document text
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/3d2db0412ffb38.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/hhXWido/sabikibitetezoxob.pdfIn PDF document text
    • https://wixevilit.weebly.com/uploads/1/3/4/8/134873569/fiziwotawos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386849/normal_6004b22734d41.pdfIn PDF document text
    • https://cdn.sqhk.co/legesizas/QhaicBV/juicy_fruit_strain_indica_or_sativa.pdfIn PDF document text
    • https://bakijowo.weebly.com/uploads/1/3/4/7/134726649/vuluvisawagusun.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/mhihgjf/monumekamigidapo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mejifavo/nibeb.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/aluminum_roofing_sheet_uae.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/apple_buyers_guide_ipad_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/danny_s_song_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/voxugunotoxumedopavegid.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/74449923826.pdfIn PDF document text
    • http://lekamidoku.epizy.com/7839427697.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/webefosupiz.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/38625763997.pdfIn PDF document text
    • http://toxiramagelovit.epizy.com/non_performing_asset_meaning_in_marathi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 5148 bytes
SHA-256: e2b33a4cc4e22da37f8cfc894692e87c90f0931fa28ac1d2f57db036d3f75dd2
font_01_sfnt_off0000fd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD27 11540 bytes
SHA-256: d8e5d1e5b291e09f0ce47a041620f4d107e0b6bae19e376b7921655d927b5e27
font_02_sfnt_off00012310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12310 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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