Malicious PDF — malware analysis report

Static analysis result for SHA-256 39307c805700381b…

MALICIOUS

PDF

81.0 KB Created: 2021-03-22 03:32:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acb4e41cf571c222c6ad66006edadcf0 SHA-1: a746ef252bc2e5a52a967c17d1db31c1262dd4e7 SHA-256: 39307c805700381bfdcf037dabdb460e3a7e075b35f4aa38744a3cdd712503b2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which are part of a link farm designed to manipulate search engine results. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into believing they are owed money or a prize, requiring them to interact with malicious links. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be part of a multi-stage attack, potentially hiding a payload within a password-protected archive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wix?keyword=kent+county+register+of+deeds+fees
    • https://vifegozotamideb.weebly.com/uploads/1/3/4/2/134236473/somem.pdf
    • https://rilumawireg.weebly.com/uploads/1/3/5/9/135981263/mufozaludesa.pdf
    • https://cdn-cms.f-static.net/uploads/4372682/normal_604f751d7b7fa.pdf
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fdfcaa26e18d.pdf
    • https://munemajof.weebly.com/uploads/1/3/2/3/132302982/3284890.pdf
    • https://fokutape.weebly.com/uploads/1/3/2/8/132814024/putiwavazarata.pdf
    • https://dopozagipixa.weebly.com/uploads/1/3/2/7/132741545/a6071255e.pdf
    • https://vejazisiji.weebly.com/uploads/1/3/0/9/130969480/rufido.pdf
    • https://cdn-cms.f-static.net/uploads/4366364/normal_6011d49d72d10.pdf
    • https://vuxojamobepu.weebly.com/uploads/1/3/4/3/134333522/8427598.pdf
    • https://tapukupe.weebly.com/uploads/1/3/4/7/134717462/3839741.pdf
    • https://kodalisurodufe.weebly.com/uploads/1/3/2/6/132680932/5491980.pdf
    • https://static.s123-cdn-static.com/uploads/4378857/normal_5fcc665884062.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_88a52f8c8aab46c790c5d4ef6bc99ffc.pdf?index=true
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_3af9fc511aec4cde8bc89f8cc2362410.pdf?index=true
    • https://s3.amazonaws.com/votawawo/35304153994.pdf
    • https://s3.amazonaws.com/rudelazifizuvo/all_of_me_violin_sheet_music_free.pdf
    • https://s3.amazonaws.com/fajonubinomeder/latatuzaj.pdf
    • https://s3.amazonaws.com/tikofaketonub/29554317293.pdf
    • https://s3.amazonaws.com/bakoloj/psalm_23_3_hebrew_meaning.pdf
    • https://s3.amazonaws.com/wetevali/dividing_complex_numbers_worksheet_intermediate_algebra_skill.pdf
    • https://s3.amazonaws.com/jezaxojipevu/gasokejemaba.pdf
    • https://s3.amazonaws.com/remavuj/animal_quizzes_with_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff57.bin
a34867ce5445fee34091b1b3d5590f75e248012aa90a958e94deab7e69ce0bae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF57 5016 bytes
font_01_sfnt_off0001108e.bin
432c1bcb3636ee96d3cfb1e362d30375655376723bbb6496ef352a627c653fa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1108E 11148 bytes

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