Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7da2a4eb84373c2…

MALICIOUS

PDF

75.5 KB Created: 2021-03-16 20:22:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e81b45f6155721cb3d389262bc562fe8 SHA-1: ee0784ddc0c23d7e925205fe9401c444494cc672 SHA-256: b7da2a4eb84373c2a14319cb8d4df8745de7852f4022678b3afcb080fea6b28c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a URL disguised as a search result. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The embedded URL points to a suspicious domain, likely intended to deliver a malicious payload or lead to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/award?keyword=characteristics+of+experimental+research+design+pdf PDF link annotation
    • http://fudoviwil.mywebcommunity.org/how_to_calculate_the_pump_flow_rate.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475565/normal_5fe3815758c85.pdfIn PDF document text
    • http://xikimifo.66ghz.com/brain_teaser_worksheets_8th_grade.pdfIn PDF document text
    • http://rabifew.iblogger.org/blitzcrank_build_guide_s8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472764/normal_5fee8bbf78aba.pdfIn PDF document text
    • http://geloritiveda.mygamesonline.org/79595640106.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/why_diesel_engine_is_noisy_in_operation.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/maxelutoniwuxev.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/kusamipatoloje.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/55575325732.pdfIn PDF document text
    • http://serefelotu.epizy.com/dotoroxis.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/hudson_adventure_island_4_nes.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/rapid_improvement_project_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/bajaj_allianz_health_insurance.pdfIn PDF document text
    • http://taroveruwidiba.onlinewebshop.net/offensive_security_certified_professional_complete_self_assessment_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/dadalomitazeve.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/losepokiru.pdfIn PDF document text
    • http://vufobaratoja.epizy.com/different_types_of_texts_and_their_distinguishing_features.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_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 5540 bytes
SHA-256: abb08a18a072ee4fc63b18e03a1e5d78ac26c3434bf1993b5f6c9a6eb11e2de7
font_01_sfnt_off0000fc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC21 10636 bytes
SHA-256: 86bf4897775c213e441907b7023ec12684a53a109c6e79069ac968151a106b19

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