Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce42652e0504035…

MALICIOUS

PDF

72.0 KB Created: 2021-05-03 13:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1e5b237456e33673d83f054710c9a0c4 SHA-1: e93e2ebc4f935910829331096109717f52ac473a SHA-256: dce42652e05040354cc88b82b116aada142dc3b6e61c6f988ee8c3842feb8573
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL and a visual download button, suggesting an attempt to trick the user into downloading a secondary payload. The presence of an external URI and embedded URLs indicates a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/strik?utm_term=man+myth+messiah+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481527/normal_6016776b350b5.pdfIn PDF document text
    • http://keruluzo.medianewsonline.com/phonics_board_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482191/normal_604ce26aeff52.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/phases_of_gastric_juice_secretion.pdfIn PDF document text
    • http://kilekapalovuzo.getenjoyment.net/58686248831.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502833/normal_5fcc61e582ffc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375528/normal_601ff74619e1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379474/normal_5ff2dd85b4799.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/bidemewufa/cetoacidosis_diabetica_fisiopatologia_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/1143863844.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/dd_monsters_by_cr.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/makipotoxuzefowa.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/great_writing_1_5th_edition_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/tiguzuba.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/65612082114.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/99043862513.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/59187523236.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/hearthstone_dalaran_heist_heroic_chapter_5_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/irregular_verbs_worksheets_grade_10.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/beatboxing_lessons.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/81936239104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e7fda05-6c76-4432-88f7-a2a7c8d955c1/27478505687.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/como_agua_para_chocolate_frases_fosforos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c516eca9-b937-46c0-97e9-fff04b7ab459/61422551341.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/87954033709.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_off0000dbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBA 5152 bytes
SHA-256: b998ba4beca78d8f6219ccb29851b69ec6e40c39f1273f4cd0f3741f949142d6
font_01_sfnt_off0000ed39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED39 11044 bytes
SHA-256: 6038682a4a721906505903dea109ec0a492bfcacbee8d0ff994135ea2dfe12aa

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