Malicious PDF — malware analysis report

Static analysis result for SHA-256 e763840bf824c9c9…

MALICIOUS

PDF

81.9 KB Created: 2021-05-06 05:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 04cabc29ccc2094ed247dbf4910326d1 SHA-1: d4c8fc1ecc217c6230c952ce51ef45263500e349 SHA-256: e763840bf824c9c966ded7b43f85b5b12d7fc7fff41e03d0396e0db07c5bd1f1
96 Risk Score

Malware Insights

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

The file is a PDF that contains multiple embedded URLs, many of which point to suspicious PDF files hosted on third-party domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to malicious content, likely a phishing page or a further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://cdn-cms.f-static.net/uploads/4471941/normal_603cecb60c68f.pdf In PDF document text
    • http://smallita.space/lapogupupizevipufegeirnuv.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/norolelawazulufo.pdfIn PDF document text
    • https://nuvomananakoleg.weebly.com/uploads/1/3/1/4/131453817/bemivokudezevu.pdfIn PDF document text
    • https://mipolapepel.weebly.com/uploads/1/3/4/3/134395859/zobafoz.pdfIn PDF document text
    • https://neritakewu.weebly.com/uploads/1/3/1/8/131856632/liguv_bodalobevexug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_60446c57a9de4.pdfIn PDF document text
    • http://raftgjgr.space/electrochemistry_worksheet_4_answers5swiq.pdfIn PDF document text
    • http://kogemotuju.getenjoyment.net/anamnesis_psicologica_definicion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459341/normal_6013765d408de.pdfIn PDF document text
    • http://instasurprise.online/kawepapigatigeaxjrc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_6020a67c2ef8e.pdfIn PDF document text
    • http://copyrights-notices-helps.com/maths_questions_for_class_4pa66e.pdfIn PDF document text
    • https://kisajevipog.weebly.com/uploads/1/3/2/8/132815123/furipivog.pdfIn PDF document text
    • http://zotoxilob.getenjoyment.net/19044634501.pdfIn PDF document text
    • http://cancandance.org/compound_effect_meansral75.pdfIn PDF document text
    • http://xatakafigudu.getenjoyment.net/what_does_the_christmas_tree_in_a_dolls_house_symbolize.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/B9wesDdUo4k/wb?keyword=life%20of%20a%20peasant%20woman%20in%20the%20middle%20agesPDF link annotation
    • https://s3.amazonaws.com/juliziwojatige/company_introduction_ppt_format.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/96644961672.pdfIn PDF document text
    • http://ligiwekuxote.myartsonline.com/42626054540.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/how_to_merge_two_word_documents_together.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/48935595078.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/nozasekugakojawa.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_off0001027e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027E 5392 bytes
SHA-256: 5f298ecd3c5ff28023e40849557760490d788df428b8af8d29b9890d100bf41d
font_01_sfnt_off000114ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CE 10964 bytes
SHA-256: d4218b4a30136023dd53853348c69d4f3f14b90bfb38d3fce48089a37f7f3c5b

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