Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8132182296fcba2…

MALICIOUS

PDF

74.3 KB Created: 2021-04-04 23:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ad81b73eda4b5be17aaa3d59d50cb2fd SHA-1: 205b973a4d91bf901e7c551860bb6074110b3932 SHA-256: a8132182296fcba2c6f957a44227d1385bf1dd5e0b15dfa93d3f24a41465614b
96 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, indicating an attempt to redirect the user to external sites. The presence of PDF-specific heuristics suggests exploitation of PDF vulnerabilities or malicious content within the document structure. The primary attack pattern involves directing users to potentially harmful external resources.

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://zonanasuwovu.weebly.com/uploads/1/3/2/6/132683154/5746796.pdf In PDF document text
    • https://zemabata.weebly.com/uploads/1/3/4/6/134677216/f4131a83a0.pdfIn PDF document text
    • http://probmake12.xyz/linux_foundation_free_introductory_coursefro61.pdfIn PDF document text
    • http://13millions-warzone.store/what_is_a_remington_700_bdl_22-250_worthototk.pdfIn PDF document text
    • http://chelamela.org/yard_machine_riding_lawn_mower_parts30era.pdfIn PDF document text
    • https://jefabogab.weebly.com/uploads/1/3/1/6/131636769/7117791.pdfIn PDF document text
    • http://lozhobelir.space/play_store_apk_directww7v2.pdfIn PDF document text
    • http://glasshookahcatering.com/31019147217pw5xm.pdfIn PDF document text
    • http://zoo-taxi.site/verilomogu5sju6.pdfIn PDF document text
    • https://nuravodabola.weebly.com/uploads/1/3/0/7/130740537/rabokovogosaj.pdfIn PDF document text
    • http://towesijep.iblogger.org/bolikokedixosemibag.pdfIn PDF document text
    • http://vezapom.iblogger.org/cmp_blood_test_results_explained.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/n4t4wXRn-MA/wb?keyword=d&d%204e%20human%20racePDF link annotation
    • http://segigeserife.epizy.com/how_do_i_change_the_password_on_my_linksys_wifi_extender.pdfIn PDF document text
    • http://xitiwefebulu.rf.gd/pekoxututudawavuzibax.pdfIn PDF document text
    • http://zawuruwune.epizy.com/bash_script_tutorial.pdfIn PDF document text
    • http://nipaxuwibaket.epizy.com/jonusawevenavakik.pdfIn PDF document text
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_e22f9be17c6e41ce93ae9280de107b58.pdf?index=trueIn PDF document text
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_7b9409c35d1e4c8db99f5be26e2eed59.pdf?index=trueIn PDF document text
    • http://tisemifoxodufe.epizy.com/building_wealth_one_house_at_a_time_making_it_big_on_little_deals.pdfIn PDF document text
    • http://mogerokefo.epizy.com/92208544965.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_off0000e87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87D 4156 bytes
SHA-256: bb1702a9e9b617346157f9ea6f36cc14559c37d4a4a2cf683ebd57dce9d2c082
font_01_sfnt_off0000f6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 10800 bytes
SHA-256: dab868d6d58970affb05a99a4cf4d96acf7ed3389bda0b776f1e5fd16e16cef4

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