Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5809f0b4bc02b4…

MALICIOUS

PDF

71.0 KB Created: 2021-03-18 07:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5669b4a1f06ce1e57f552695aefbf2c SHA-1: d438de9782f6d0b6e302f5a3fe98d1fd21448087 SHA-256: fd5809f0b4bc02b4e144243dbdc9d5d5dedaac182094c7481716b2c24862c3fb
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that masquerades as a book title, likely intended to trick the user into clicking and downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of multiple unknown reputation URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://jumiwimov.ru/wix?keyword=maroo+of+the+winter+caves+full+book
    • https://static.s123-cdn-static.com/uploads/4389097/normal_600519770e264.pdf
    • http://binadof.iblogger.org/dupedinedizivo.pdf
    • http://bifovasux.22web.org/49107077373.pdf
    • https://cdn-cms.f-static.net/uploads/4380210/normal_6027b94894ca0.pdf
    • http://bedomukuruxe.22web.org/bhakta_pundalika_saathi_video.pdf
    • https://static.s123-cdn-static.com/uploads/4368494/normal_5fca89c337fde.pdf
    • https://cdn-cms.f-static.net/uploads/4409826/normal_6021f630c45ff.pdf
    • http://pusokum.66ghz.com/hernan_cortes_biografia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_4302cb35e03e48b3a8167b8da843e97e.pdf?index=true
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_4c851af563bf4208bab256715190172c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5f155e56-65f4-4770-a618-8e633461fac3/how_to_learn_cloud_computing_for_beginners.pdf
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_3a0463a126f444139f1fbc4e74759bbc.pdf?index=true
    • http://xuwuxubemepimox.rf.gd/kizevexetefabanomum.pdf
    • https://uploads.strikinglycdn.com/files/9f52f6fa-811b-413c-80d1-6423f400deed/how_to_solve_imaginary_number_problems.pdf
    • https://uploads.strikinglycdn.com/files/afd0d5ab-a33e-4494-b9ef-a7bad18572fd/nikon_coolpix_p510_how_to_use.pdf
    • http://giwofigu.epizy.com/8989194941.pdf
    • https://uploads.strikinglycdn.com/files/357317c5-9527-49b8-8552-043b67111d82/what_social_work_and_community_development_entails.pdf
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_fca72cb6b8f24cf89c12706ef589fe53.pdf?index=true
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_e39b3b6e49594ac38f8edd8a761080c7.pdf?index=true
    • http://sezusol.epizy.com/64184790649.pdf
    • https://uploads.strikinglycdn.com/files/35e1e930-eea1-467a-8819-156fa1577f2e/87433612840.pdf
    • http://fezabum.rf.gd/62656955007.pdf
    • http://vefibuvusesusu.rf.gd/adam_joan_bgm_ringtones.pdf
    • http://boribasumagit.epizy.com/undertale_genocide_guide_waterfall.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_off0000d8ac.bin
b053aeb5bc1565ea7d146374a982384666b688b2516ecf80a0083c3c0946467f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AC 5328 bytes
font_01_sfnt_off0000eaef.bin
fd21d711211328d216f55556dace858ce2500403ae062945dc4b1ace7c104441		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEF 10472 bytes

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