Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de2af6b618ff68e…

MALICIOUS

PDF

291.2 KB Created: 2021-03-30 10:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 074b9982105ea5fab08615a337f12df0 SHA-1: 2940516592ca3d10d5e599d596204e4577b01cb3 SHA-256: 9de2af6b618ff68e0913e992da57e9bcf8e1ae019d43c99743b9a5e712d625b1
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a potential external link. ClamAV also detected this file as Pdf.Phishing.Trojan. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of an embedded malicious URL suggests an attempt to redirect the user to a harmful site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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://resalured.ru/strik?utm_term=singer+2018+china+hua+chenyu PDF link annotation
    • http://nakodinita.scienceontheweb.net/caste_certificate_form_bihar.pdfIn PDF document text
    • http://bossyonlinex.com/61955028007dipg9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421614/normal_602aceb8c8acb.pdfIn PDF document text
    • http://satibudax.22web.org/bitodinetilarewid.pdfIn PDF document text
    • http://feedbacrnz.space/52263002270smnnb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458628/normal_6004f8290e1d9.pdfIn PDF document text
    • http://sajitalunaded.22web.org/horse_head_craft_template.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/maharashtra_6th_pay_commission_report.pdfIn PDF document text
    • http://peskomment.ru/how_to_put_amazon_echo_in_setup_mode345fq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ec560393-4650-4708-bf0c-d08fceb8458c.filesusr.com/ugd/ca69db_2af9dc8189e141969ee68ea0647c2237.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/concise_english_grammar_questions_and_answers.pdfIn PDF document text
    • http://sibijexobesu.epizy.com/irrational_thinking_patterns.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/linear_programming_and_network_flows_2nd_edition_download.pdfIn PDF document text
    • http://lojubefogugiku.onlinewebshop.net/vutobuzugarewedibagaki.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/oxford_placement_test_2_grammar_answers.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/accounting_theory_7th_edition_jayne_godfrey.pdfIn PDF document text
    • https://2e4b0ed6-c237-476e-b23b-7c95f147629f.filesusr.com/ugd/30e930_42332ada81804c40b276b4e80642726f.pdf?index=trueIn PDF document text
    • http://gabatotudam.rf.gd/y_a_pesar_de_todo_te_sigo_queriendo.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/can_you_do_autocad_on_mac.pdfIn PDF document text
    • https://bed2d873-735b-46bb-a8a3-264d0455df4e.filesusr.com/ugd/03ede2_58089539b3df4453a6440c5903eb4a76.pdf?index=trueIn PDF document text
    • https://fec450ea-b80f-4746-b851-35139cc02de5.filesusr.com/ugd/53a83b_0a80c1b7664246689ba247175e65339d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dozuga/lesatunanajojilug.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00018f20.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18F20 226548 bytes
SHA-256: b6b6faec0b871ccf93e40fe13248fa17bf911afa9d94c8d1479cd9866892e315
font_01_sfnt_off000427b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x427B5 5576 bytes
SHA-256: 3d16d83bbc4b11298d10a848710261e08900c91d3d956e36ad430820470a22ed
font_02_sfnt_off00043ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43AB7 15200 bytes
SHA-256: 91d82267c62f531d27b8f2d5d38fad414ebdcf5254768096e1bd12af9f4c18b2
font_03_sfnt_off00046873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46873 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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