Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b083d9a4fa6e5e…

MALICIOUS

PDF

84.2 KB Created: 2021-03-01 01:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e0281284b10ee4dde57465e17055718 SHA-1: 10cc2595d3287ff2acde1e9f3442b42cfe66aed1 SHA-256: b0b083d9a4fa6e5e1d4b0fc07d9983f082b3205951644de2e03655e9580ac815
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, suggesting a link farm designed to distribute malicious content or phish for credentials. The document body, though heavily obfuscated, contains text related to downloading PDFs, aligning with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://nipisod.ru/123?utm_term=world+history+textbook+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4495395/normal_60101f53b1280.pdf
    • https://cdn.sqhk.co/pizokifuxe/gjdgcLW/giputigov.pdf
    • https://cdn.sqhk.co/bevurokakug/hcChejd/america_s_funniest_home_videos_wisdom_teeth_2018.pdf
    • https://cdn.sqhk.co/gafisasiwu/iieJgg5/nojugusibixozetip.pdf
    • https://bagobizofenagex.weebly.com/uploads/1/3/4/7/134767931/77acf7.pdf
    • https://zetitazafoxiz.weebly.com/uploads/1/3/4/0/134040412/da71229a.pdf
    • http://fakutavavuzixin.22web.org/sea_cadet_corps_uniform_regulations.pdf
    • https://cdn.sqhk.co/nedabuke/jhOFilM/smart_and_final_hours.pdf
    • https://cdn.sqhk.co/tajixixejafi/ciM1VJN/73599940221.pdf
    • https://cdn.sqhk.co/namaboniki/i3oiiid/66981907970.pdf
    • http://munupesifak.22web.org/battlefield_5_pc_google_drive.pdf
    • https://kekuxepepave.weebly.com/uploads/1/3/0/7/130739312/tagal-kowak.pdf
    • https://tibilizam.weebly.com/uploads/1/3/0/7/130775373/cf6d581c.pdf
    • https://static.s123-cdn-static.com/uploads/4463286/normal_5fff585cf164d.pdf
    • http://mepanawabopod.22web.org/factoring_word_problem_worksheet.pdf
    • https://cdn.sqhk.co/nuroteditu/Ghddig7/love_stories_tv_snapchat.pdf
    • https://cdn.sqhk.co/zadoweferoxe/fGXcPDv/american_hangman_movie_netflix.pdf
    • https://cdn.sqhk.co/dakuwuwuzije/hhjbieg/45297439646.pdf
    • https://retumitoratosu.weebly.com/uploads/1/3/4/2/134234586/8962655.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xexelakufakeze.epizy.com/autodesk_3ds_max_2016_xforce_keygen.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_off00010ab6.bin
30fd7ad6e2433b25e8dad4255f0b49352717ec8aa1ae5b5a978c2f321e6a7768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB6 5608 bytes
font_01_sfnt_off00011dda.bin
ddb8e3d73f561fbc024bdd7b82dd45ba2a9d0d35bdc1fab253ee27b5cba9dba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDA 11216 bytes

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