Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ed5bbb6a511476…

MALICIOUS

PDF

68.2 KB Created: 2021-03-09 13:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 98743bcdafa3d53a75fc2197836d6f3c SHA-1: 364bf4d79247b919daba021c231187e358b8d438 SHA-256: e4ed5bbb6a511476d0577f705032bf33388d82dfb07b879cab4a6134d8df0e4f
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution scheme. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM further supports this, indicating the PDF is part of a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=spongebob+working+out+with+teddy+bears PDF link annotation
    • http://iwhite.space/acronyms_quiz_game_answersp5gqt.pdfIn PDF document text
    • http://sunshop.pro/whatsapp_status_animated_videos_free8yden.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497395/normal_60297cd4b0d2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_6012093562f23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454041/normal_5fe34b51b2e79.pdfIn PDF document text
    • https://watagejikifawup.weebly.com/uploads/1/3/4/5/134589749/sezawaga.pdfIn PDF document text
    • https://ritixiduj.weebly.com/uploads/1/3/5/3/135308555/1970097.pdfIn PDF document text
    • http://gk-kuban.ru/chammak_challo_dj_remix_song_freedshaq.pdfIn PDF document text
    • https://rategojo.weebly.com/uploads/1/3/0/7/130739688/df037.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377925/normal_5fdcd0f4945c3.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/quando_vai_ser_domingo_de_ramos_em_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492246/normal_6014ffcade010.pdfIn PDF document text
    • http://seomagnat1.online/pejij37aut.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/my_hero_academia_season_1_episode_3_anime_planetedv2f.pdfIn PDF document text
    • http://hugertely.xyz/66090285066hdwbz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_9d79cd6b9b2247d7a3d645bcda348feb.pdf?index=trueIn PDF document text
    • http://timerojulawu.myartsonline.com/97118044311.pdfIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_8d85fa48b1934f17b54e22c9cb8fc715.pdf?index=trueIn 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_off0000cf31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF31 5688 bytes
SHA-256: b39a9aaed1fba647a0f43ad3ba5d280b7066717f44f8a7e7cf089ac181725d31
font_01_sfnt_off0000e297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE297 9692 bytes
SHA-256: a30fe9c39913c93a0cbf1482b021f054831377c20e4eaa6c28ec0c53e9d78fb7

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