Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0a35034d1a3817…

MALICIOUS

PDF

99.7 KB Created: 2021-03-13 20:13:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d772ff1e7f5b39e3c68694ac7bb03752 SHA-1: dfa23ad1a05f008505898f5dd8afd7d85f456a56 SHA-256: 3f0a35034d1a381767fb863578da0ae3845b57d2b57c61caa5ccfe6aa65ede13
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://dafemum.ru/award?keyword=peugeot+3008+egypt+brochure+pdf'. This URL is likely used to deliver a malicious payload or redirect to a phishing site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/award?keyword=peugeot+3008+egypt+brochure+pdf In PDF document text
    • http://gosunenibunale.getenjoyment.net/90681640481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452193/normal_5fe98d4d06eeb.pdfIn PDF document text
    • http://bigijawiv.scienceontheweb.net/what_problems_does_a_bad_catalytic_converter_cause.pdfIn PDF document text
    • http://radogomi.mygamesonline.org/can_roomba_614_be_programmed.pdfIn PDF document text
    • http://fanogizakelime.iblogger.org/adverbs_exercises_with_answers_for_grade_6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481528/normal_5fd31604b232a.pdfIn PDF document text
    • http://tujidal.mypressonline.com/cuantos_son_los_libros_juego_de_tronos.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/fraction_decimal_percent_table_worksheet.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/bomifabipi/tennessee_williams_a_streetcar_named_desire_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f55e08a-6a38-4881-94f2-0bec31e9cbe6/magic_tree_house_free_audio_books.pdfIn PDF document text
    • http://xitisif.rf.gd/17670408325.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/gedaxis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/454d8dd0-010b-4cbd-b9fb-73b424c190f7/how_to_factory_reset_palo_alto.pdfIn PDF document text
    • http://rezopaduj.epizy.com/18542532110.pdfIn PDF document text
    • http://zavufomagug.rf.gd/jigerinijezesilugiji.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/37189624015.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/saxijisemabopi.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/picsart_apk_for_windows_10_free.pdfIn PDF document text
    • http://lotarikavim.rf.gd/activity_diagram_for_online_food_ordering_system.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00014831.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14831 31632 bytes
SHA-256: 0ef0ab7a40c8a757aa7f1f69199859d0aadc2c213bb7c5a3d6b764dd7428b845
font_00_sfnt_off000110a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A3 5740 bytes
SHA-256: 85c6b5048749649978926df7ed651e84f8b7693933b79fdb8baca3efae909eb7
font_01_sfnt_off00012439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12439 10448 bytes
SHA-256: 2399d837d0b1219f7ea4a5a0f5ad0a156a662a379cf5dce39f626c4d5ae034a4

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