Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa42aeedafdb7574…

MALICIOUS

PDF

70.7 KB Created: 2021-05-17 00:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ab93900aeb0a281df114c5209d3f2f0e SHA-1: 18842092d8218a807763e59bd4ff3bd7a6dea36e SHA-256: fa42aeedafdb75746c2b1f7b7d98cddb2b118d3601d077d4a645d69dde11a660
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to a smoke alarm, directing the user to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit PDF viewers to redirect users to the identified malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=first+alert+9120b+smoke+alarm PDF link annotation
    • https://cdn.sqhk.co/dulemokel/9gdgj34/new_areas_of_novel_writing.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/sub_zero_650_manual.pdfIn PDF document text
    • http://nenegifivujaxu.mypressonline.com/effects_of_overpopulation_on_environment.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/hihgDQg/evertech_sandbox_apk_obb.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/jepasixamabibalezakudob.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/ihAhajb/85043424988.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/h4gejbC/batowomunu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikegasek.epizy.com/is_there_gonna_be_warcraft_2.pdfIn PDF document text
    • http://mevuxuru.atwebpages.com/babylonian_talmud_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/what_does_spanish_don_mean.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_9adfee7917264b2888185d6f30994b06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/jobaxorunesulovekitusodud.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/fexotoxozalajifupime.pdfIn PDF document text
    • http://pavejovubebus.rf.gd/anorectal_malformation_type_radiology.pdfIn PDF document text
    • http://pesetunal.onlinewebshop.net/74927812042.pdfIn PDF document text
    • http://zoferuwarutor.epizy.com/57158973837.pdfIn PDF document text
    • http://wukevivetarapu.myartsonline.com/rivavitumagobefelip.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/bemizixegadomipodizijal.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_16a73b3f89a34c56991d0843dae6072a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/cd_calendar_template_2020.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_off0000d591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD591 5472 bytes
SHA-256: 7e618aa902e2c6ef394bff0f6b1c4d6484d35a087ea0f22d20bef1fa098a0b99
font_01_sfnt_off0000e80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80F 10340 bytes
SHA-256: 583b13d6bd29d80bec0aa02c880eb60330d684a6208cd33a34a7c40e4197a947

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