Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa46198312c9e51…

MALICIOUS

PDF

72.0 KB Created: 2021-02-16 07:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2444620225dc39eedef14f22e7def39d SHA-1: a3378cab75309616b9c79930ba61264778bd3fce SHA-256: 1aa46198312c9e516e8ea7cb2d0b0cac915f517183b92861ea79504ef5f03dc7
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, directing users to a URL associated with phishing. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious URLs and the nature of the PDF content suggest a phishing attempt to redirect users to potentially harmful sites.

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
  • 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://crophysi.ru/wb?keyword=how%20to%20figure%20cash%20flow In PDF document text
    • http://websporizle3.com/vidufexobidenuzofonesebofdj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385617/normal_6016d4ac3f072.pdfIn PDF document text
    • http://mini-camera-super.club/island_village_long_beach_homes_for_salezhsrs.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/iOqjiha/ludo_king_pc_setup_download.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/lethal_league_blaze_unlock_guidefr0oq.pdfIn PDF document text
    • http://lnstagramcentre.net/83547987070to3rr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501486/normal_602213b06eb76.pdfIn PDF document text
    • https://cdn.sqhk.co/lukejisuvawe/jhc3Uge/27389524053.pdfIn PDF document text
    • http://kyrgyztours.com/somitisesipelulenekowifojps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_5fdad5ccc7224.pdfIn PDF document text
    • https://cdn.sqhk.co/xetosusaxi/f1hdhgf/sododuwanipewudina.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://s3.amazonaws.com/nisiwanolom/basic_english_course_book.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/wemosetoli.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/antigona_furiosa_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/72617731360.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0B 4972 bytes
SHA-256: cb21cccbe771f882ab38cb84c98bb3f3c4318a78531629f902ed6f24f255630f
font_01_sfnt_off0000e026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE026 10808 bytes
SHA-256: 820296755389c27c42640c042dd694622a1a29f9839603e388918ede046a2413
font_02_sfnt_off000104db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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