Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22daa96f83b7494…

MALICIOUS

PDF

79.9 KB Created: 2021-03-23 12:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aaca1b75dd137587e63db5b99817329 SHA-1: a3abc9869bfec4f47b2d3b420889c39f8c59cbea SHA-256: a22daa96f83b7494ea419de1572f57dcb05a112e733cd5e5bae9198cbae5dd15
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external links, suggesting a link farm or SEO manipulation tactic to drive traffic to potentially harmful sites. The presence of a download button lure further supports a malicious intent to trick users into downloading unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=drastic+ds+apk+cracked+download
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/10dc9e4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mukutud/information_about_canada_country.pdf
    • https://s3.amazonaws.com/bewibiwat/google_analytics_report_template_free.pdf
    • https://s3.amazonaws.com/jiguwuzobozobaz/latex_calculation_sheet_template.pdf
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_14273cf547304cf3b7830e9a06eea775.pdf?index=true
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_531b9cb631d9491489adeb6bbfd00061.pdf?index=true
    • https://s3.amazonaws.com/jemisajoda/boneco_air-o-swiss_demineralization_cartridge_refill.pdf
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_8f3e05ffe85146b4b4053f80bc5a4260.pdf?index=true
    • https://s3.amazonaws.com/fidefofudi/89593735425.pdf
    • https://s3.amazonaws.com/jubiferekaka/bharat_new_film_song.pdf
    • https://s3.amazonaws.com/dovulavavo/zedozajisovi.pdf
    • https://s3.amazonaws.com/jufowokedunod/7531428174.pdf
    • https://s3.amazonaws.com/jidosatikim/25176339567.pdf
    • https://a3abd3d7-f7e4-4b0c-86b7-ec358d8c805a.filesusr.com/ugd/97a3b3_b8c0db454559417ab9a984c2eb6aad94.pdf?index=true
    • https://s3.amazonaws.com/xarojapi/minority_report_dual_audio_480p_khatrimaza.pdf
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_f011338e71a14927ad9b883492e0ec1e.pdf?index=true
    • https://s3.amazonaws.com/tanapilamaxi/web_design_in_easy_steps.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_off0000f95a.bin
5f745dc768cc431b5ddda301f3401613d6948a40beb4086382831b86e7179a22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF95A 5220 bytes
font_01_sfnt_off00010b43.bin
86ad714b222528d8a877b1ce93a69fe5ff666aa5d8ef5b8628d9353c7d2c4bc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B43 11408 bytes

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