Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0882452d386bf8…

MALICIOUS

PDF

83.9 KB Created: 2021-03-18 16:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: adb39bb88de52a8fb59f880e47decc7e SHA-1: 6eb2f700dacdf6896b225fb46406927dc1a64b60 SHA-256: fb0882452d386bf8fe49d3730c9c6ae26adafdcb900d97045f3dd346bc4f3f5a
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 ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to a search query. The presence of an external URI suggests an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=what+food+is+gluten+free+at+starbucks PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422914/normal_60504a91da291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461773/normal_6043458b76dd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_60413a98197cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_6013b5ef5c372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465938/normal_5fd9e33e2843f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd1ff61-4977-40cc-a6eb-e026cde8002a/5693740194.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/basic_excel_formulas_list.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/56819343023.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/nintendo_switch_a_link_to_the_past_remake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee27fbf9-6c57-4b5e-88e1-dd07ef336db8/10097879268.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/10_uses_of_computer_in_agriculture.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/happy_birthday_violin_solo_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/brave_frontier_global_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eace718e-a344-4b3e-9702-383fe14c3212/ruxutezudivekofoliv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b3691a-ce40-40cf-a7e6-ad4d85a73c6a/74659192268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb992daf-b952-41b0-921c-f74a472b7ab6/9312817625.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/what_foods_burn_fat_while_you_sleep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fc93dc-ca22-4ed2-a48e-10d5e6536d4e/whirlpool_cabrio_dryer_making_loud_humming_noise.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/rivals_for_catan_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a07ca1b-212a-438a-9503-ea03dad55976/96185513326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e228042a-d9be-4a4e-8bbf-cb10b2cbe086/fefipevominivuxavisel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF026 5500 bytes
SHA-256: 984b45b98c90be4e921ec74a372b2c2125167b503062324a7cb662ccebab5c37
font_01_sfnt_off000102e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 11784 bytes
SHA-256: 623a5e112758032215500fd40a2005efac3c1e9c7a84b3bb5d75559c99c4780d
font_02_sfnt_off00012a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A95 16392 bytes
SHA-256: 1a2cef344135cdcc96c5e1f54e34dedc508871894fe74269a84f378fcf36fd5f

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