Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c8ebc333201998a…

MALICIOUS

PDF

75.4 KB Created: 2021-05-21 19:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d7cf82c3ee3b271c0476a5676d6acde0 SHA-1: 2a728acdd27c1a46cb3a47eb016c39fa1216386f SHA-256: 3c8ebc333201998adcfd7a849e36ff590e7c968ed4b9e13ebc5161f6148357bc
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. The ML classifier and ClamAV both flagged this PDF as malicious, with ClamAV identifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be related to the URL's query parameter, suggesting a phishing lure.

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://soxebez.ru/strik?utm_term=how+do+you+get+chick+fil+a+points PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420602/normal_601f132e7fc45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482426/normal_5fc871171e57c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419650/normal_5ff44dd75ea93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394079/normal_5fce71d93bd79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403118/normal_6044fe5e7ae43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372985/normal_6028b1cbbbe7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450250/normal_603d5f3981f6a.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/jajuzasalikirut/inception_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/49274165510.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/archeology_merit_badge_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/20658545924.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/wifudubujakogu.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/74879078986.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/e_design_herff_jones.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/50026061182.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/49317640848.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/icebreaker_worksheets_for_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/c_o_form_d_in_t.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/12018079987.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/android_retrieve_saved_wifi_password.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/suletekixagepurexaboje.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/40454691890.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_off0000e59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59C 5540 bytes
SHA-256: bb0550dfadafc14dabf0dbcbeb789d800437066a95ad0281baa22b28c0c87e37
font_01_sfnt_off0000f898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF898 11944 bytes
SHA-256: 7ce30ce17cf0d34113de0df78235e1d438f6f120b493b49eb513034286430347

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