Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc92a942383d781…

MALICIOUS

PDF

78.0 KB Created: 2021-03-01 20:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b052f32e525b6e0729406d9f74617c0b SHA-1: cd83ddeec2d4f9927fd1b2fac344275cc593d7c0 SHA-256: 6dc92a942383d781766d07106e9ce5808dc98fe551f06775be61debd4a1544c6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are hosted on disposable platforms like Weebly. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=balimund+merchant+chest PDF link annotation
    • https://lalotuzeguraja.weebly.com/uploads/1/3/1/3/131383936/zepamuv.pdfIn PDF document text
    • https://jasudelile.weebly.com/uploads/1/3/4/0/134012727/1780415.pdfIn PDF document text
    • https://cdn.sqhk.co/jalafimimodo/hcghMje/jasulumisijudorowekonole.pdfIn PDF document text
    • https://vivenovexo.weebly.com/uploads/1/3/4/6/134695888/sagidofefodixiju.pdfIn PDF document text
    • http://hihikane.space/kofolofumoxexilajujutdoe9.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/tinevenize_femobutikot_vuloriwigir_sixosej.pdfIn PDF document text
    • https://satisetuxa.weebly.com/uploads/1/3/0/8/130813646/bd160ba2c.pdfIn PDF document text
    • https://cdn.sqhk.co/lutotilivik/QsPuggP/fafisumotek.pdfIn PDF document text
    • http://maslovauto.ru/english_guide_for_class_5bc0i3.pdfIn PDF document text
    • https://dukiferuxol.weebly.com/uploads/1/3/0/8/130873869/81a2243.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/hgHpbig/sago_mini_fairy_tales_quilt.pdfIn PDF document text
    • http://azorocheat1.xyz/rozozezotatokoduzofanoelt7j.pdfIn PDF document text
    • http://hotita.space/rimworld_best_clothing_to_sellz9aib.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/anXggle/v_movie_songs_lyrics_ringtone_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wibutena.rf.gd/65566953629.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/format_of_formal_letter_to_a_friend.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/ejercicios_de_trigonometria_en_la_vida_cotidiana.pdfIn PDF document text
    • http://volomuladifute.rf.gd/10081707062.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/nokuxawurabur.pdfIn PDF document text
    • http://vozoxutizetu.epizy.com/american_heart_association_bls_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/36053233393.pdfIn PDF document text
    • http://beranaja.epizy.com/espen_guideline_clinical_nutrition_in_surgery_espaol.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_off0000f494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF494 5228 bytes
SHA-256: 7050c334526b9bdca4d1c5be7238dd4f432af0d6f91d7e800309da4dc3929ad3
font_01_sfnt_off0001062d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062D 10844 bytes
SHA-256: 15650d1fcd7118e893b5afcd95d9b5030922cceea5bc2fbd131c07f31010bb00

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