Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d5adbefa3ef649…

MALICIOUS

PDF

79.6 KB Created: 2021-04-19 03:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7a52a8ad82f631bd19eeac3c33eb8451 SHA-1: 83381a616356fd851f47dec9b0dbfb766156e1a9 SHA-256: c7d5adbefa3ef6492a03551dd588d7e3502d9690d0556e0daad0ae986c5e842b
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous embedded URLs pointing to disposable hosting, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a malicious intent to distribute links.

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 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://mezovuduw.ru/strik?utm_term=baby+bullet+walmart+usa PDF link annotation
    • http://gejikojaki.scienceontheweb.net/el_feudalismo_pierre_vilar.pdfIn PDF document text
    • http://nelilovodik.scienceontheweb.net/basic_english_grammar_rules_free_download.pdfIn PDF document text
    • http://lupobel.22web.org/88960532228.pdfIn PDF document text
    • http://ninavadilu.22web.org/95542722218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482009/normal_5fdc19e06c308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461245/normal_606b280d6cf7d.pdfIn PDF document text
    • http://zupuvotan.22web.org/bitcoin_gold_address_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_601760fe2d561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452845/normal_60294137c81e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374708/normal_6007fc3ac2bd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447251/normal_5fec7d37d7a68.pdfIn PDF document text
    • http://kavelokafozi.medianewsonline.com/biodata_format_for_marriage_tamil_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_2c6d25c42e4640a0afdfa187cf7e27d1.pdf?index=trueIn PDF document text
    • http://lagarudu.epizy.com/espn_sports_reporters_female.pdfIn PDF document text
    • http://wimareji.rf.gd/atahualpa_yupanqui_guitarra.pdfIn PDF document text
    • http://zujisofivo.onlinewebshop.net/fuwimaloditulakiwuroke.pdfIn PDF document text
    • https://a3abd3d7-f7e4-4b0c-86b7-ec358d8c805a.filesusr.com/ugd/97a3b3_835ad6c8e56b471e95149265274217e9.pdf?index=trueIn PDF document text
    • https://9abff256-b119-4e75-a612-dfc075f5428e.filesusr.com/ugd/c73517_1e0d280e32b9458cb25db616f0927b32.pdf?index=trueIn PDF document text
    • http://rijonitapadon.myartsonline.com/3055476624.pdfIn PDF document text
    • https://f867c6cd-7aae-4938-a634-6821dcb48262.filesusr.com/ugd/eb45fa_062a1765e8854771a52f6beaaebc1fd5.pdf?index=trueIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/farifaredeja.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_off0000f933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF933 5216 bytes
SHA-256: 89befc3760bd436d03e9276dc4c1d0c8e3231ed6849456d27baa83c0cffbad38
font_01_sfnt_off00010aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AED 11240 bytes
SHA-256: 56674a488ed72d992e5aabb4450e1a02c7e679c44dc24b832e04651991b41312

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