Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8bbe3ba34e20965…

MALICIOUS

PDF

72.7 KB Created: 2020-11-25 19:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d081bb5106067cc593382186712c584d SHA-1: c53de8c4c48c2a296cb28e6c4fa1ada6cc4f62db SHA-256: b8bbe3ba34e2096545715a3edac11ed138bcda87a42e8e76b3660f2d4f97ad97
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. The embedded URL 'https://trafffi.ru/123?utm_term=saiki+k+season+4+release+date' is likely used to deliver a phishing lure or a secondary payload. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=saiki+k+season+4+release+date PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370265/normal_5f8b530794b64.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/fe1ab57c-ba67-4bb6-bbc3-ebaed81eeef6/raderotato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40b5863-6d6d-4ec8-b684-33c80ef045cc/gemegol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fca931c-f518-4111-8007-dc86a620a58d/29476353951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10933b46-715b-4687-9334-9a2829e23f7c/cursed_treasure_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a68283b4-3366-4ea4-aa06-b3ed1526a93b/29411880596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2dbadc-df90-4327-8b72-d7038dd007e0/florence_cradle_of_the_renaissance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a47a96-9519-45f7-8368-d24c0b94e28c/interpreter_of_maladies_chapter_4_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481c4bf2-6093-4218-9a5d-0f9bebf6ce67/5781525314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d2668b-5ce8-4056-acbf-02023b42829a/20161842019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d71bcc70-216d-4495-a886-60e7911c7a0b/a_day_in_the_life_of_a_knight_from_medieval.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec17116a-6b29-4296-bcc5-6ed48d05c351/fibulasivadebomebaguke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38660854-1dbd-4c71-84b4-6ba34e051f3f/samsung_dex_for_pc_beta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f624542a-306e-4a27-8c83-4e632b61a427/42706432732.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_off0000df31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF31 5072 bytes
SHA-256: 31a87d3e8115da5671b773ca69a9b59de8d875925697536439202f971c1dc243
font_01_sfnt_off0000f085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF085 10940 bytes
SHA-256: ecac126d45937e213b7e8318c2965afe790f6cd3641380030645f62bcc4f5f1c

Open this report in the interactive analyzer, or submit your own file for analysis.