Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e28752e3b49632…

MALICIOUS

PDF

73.6 KB Created: 2020-11-25 22:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 460b0eb0512cc1d8d998bab561fe21f9 SHA-1: 19cf1958529de0f8050cd81ff5fb620a0548a45a SHA-256: 57e28752e3b49632acc24e0a8e6c6cd0d7cd8065bc6217b764a3f6ff4a2b2ae3
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely intended for phishing or malware distribution. No scripts were extracted, but the presence of an external URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=ost+age+of+youth+ilkpop PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408987/normal_5f9af1014a421.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f6452062-6c2d-4f26-a424-42d7ffd3a121/simijapanuzebenofomomixi.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/ross_university_school_of_veterinary_medicine_ranking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ca26eab-ea20-4691-8292-886975044afd/bewutemunamuxulafajag.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/alberto_fujimori_forma_de_gobierno.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/sql_server_2008_r2_sp1_cu6.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/xirumiwuzudaxenaviri.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/xufenitidazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d998174d-91f2-46e7-9c49-96df535d329b/gokimekowevugemejajun.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/garbage_guide_to_pokemon_ruby.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB27F 4240 bytes
SHA-256: 1454159d11a6edee49ffe01f22339aa63477cf604af1b688fc0518565e86eac0
font_01_sfnt_off0000c187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC187 5036 bytes
SHA-256: f7f563b0f2538e09e143b1e4ca381c4b026d76ba4f7f8acc99742e95b85466d7
font_02_sfnt_off0000d2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C3 3544 bytes
SHA-256: 7c418d88768f7e8622e3ede5936550fa2fb4a6a44abd7ca4194e60fd3f323f67
font_03_sfnt_off0000e06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06A 14808 bytes
SHA-256: 0fd40fbad01fbdc98aefe31141d22c7b18765d6f566714df2a121bff3c62deb4
font_04_sfnt_off00010a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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