Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1591db6e14c2233…

MALICIOUS

PDF

89.4 KB Created: 2021-04-22 08:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 27c2b938685dbb06ba6ba4e8fa31b055 SHA-1: c69a3d1e0fb13292b1b8cee8af91c63401e84ded SHA-256: c1591db6e14c22330b85c33b0f9bbee50ef2bf5e1b8f16eb96f61dd4bea8096e
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malicious content distribution scheme. It contains a large number of external links, many of which are disguised as legitimate downloads, and one prominent URL points to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to harmful sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=descargar+m%25C3%25BAsica+mp3+gratis+para+celular PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490917/normal_602a4338ab629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_5fe635dab39df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443372/normal_6027373da0c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_600ff6ddb5569.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_b6ba011e4e1649219cfc146808f55416.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxelula/getting_rid_of_coliform_in_well_water.pdfIn PDF document text
    • http://kawuduzan.rf.gd/8168494978.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_31f6ede20abb4d1c827de4b10f54300f.pdf?index=trueIn PDF document text
    • http://vufefedutuja.epizy.com/street_law_a_course_in_practical_law_eighth_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/foam_sheet_online_buy.pdfIn PDF document text
    • https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_2cb7b14f7e314bb5a87ca3635cb6f23d.pdf?index=trueIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_346e150beb234758b5da81d6b22095fa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pafexegud/99390574119.pdfIn PDF document text
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_6df592cfffa841e4998cffd098554749.pdf?index=trueIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_e59e024ccb0f4410af507740cfaced87.pdf?index=trueIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_fad0aab491ff4e378804c05063abf70a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/kagan_learning_strategies.pdfIn PDF document text
    • http://nimuzujonigidu.rf.gd/steve_jobs_autobiography_amazon.pdfIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_4bb3100fb64741f296e49c72e6563830.pdf?index=trueIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_ac3e2dd6d5c942759077f93923003554.pdf?index=trueIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_bbc17d1ed12144bdb2f00e9fb9d131ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/tojolabanubiwi.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_off000119bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BF 5532 bytes
SHA-256: f82378d211cd52b54b3204ae4dccf25ee633b3382272791c46102358e1242344
font_01_sfnt_off00012c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C54 12620 bytes
SHA-256: 464a6c6be970c03504e74a39d59d5244867ebf8ece8aaff3489bcdbcd62e1e21

Open this report in the interactive analyzer, or submit your own file for analysis.