Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d54986f699c259b…

MALICIOUS

PDF

81.6 KB Created: 2020-11-11 13:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 944ce98dffec22cd86233bb2618cdcac SHA-1: 96d45b71b4d34c6260a921e376965581e9ba175b SHA-256: 2d54986f699c259b181f90c8e53bd18a67766523dc1535aa963f28b809d03c48
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?keyword=zakum+quest+guide'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://ggtraff.ru/123?keyword=zakum+quest+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5fa1c0d67de4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/quaking_lady_of_shadow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eff77efa-3d96-4b2a-b34a-d8709383d087/20421336484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b9bfd7-1f92-4ff9-9915-50abcbab116b/nixomuma.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/videl_and_gohan_son.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/feudalism_in_europe_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638a2d80-7e34-42cc-9068-4b635231b609/vazoxovuwivemavad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9db7c00e-fed2-48ee-a1a6-0e738fe66017/aera_conference_2020_registration_fee.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/xirugalesalisomotaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/41628752106.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD224 3220 bytes
SHA-256: 2eafb78263b957cbc5a8cbdc482c6e0e160326e3c94edb7ff63dc66a50697da4
font_01_sfnt_off0000dd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9A 5164 bytes
SHA-256: 0c657a827bf1b1cd6be8fbae1f9598a51192f81fd7a3847a50a72751e34652b7
font_02_sfnt_off0000ef12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF12 5672 bytes
SHA-256: 4e47a1cfec9eae10c5ef3f9d0a936055406f02ce602d7b15d9f7102e4da8f58d
font_03_sfnt_off0000fd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1F 10940 bytes
SHA-256: 26066d003ddc874bc6d281fd584ac669ebd647193c041fed01d37f4771994d94
font_04_sfnt_off000122b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B6 16316 bytes
SHA-256: df07545339f7a8045ef3bf8b8ca9cf4d573a310705e11485341b94aa2c4febcb

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