Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac565614b16e5836…

MALICIOUS

PDF

78.5 KB Created: 2021-02-14 16:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2fdf8f8c0e5f86f8b8937ecf38a555ac SHA-1: 3eab69d0eaf29330eb565b9a6186d1afaa1992a1 SHA-256: ac565614b16e5836f104b228c2c00d961d585af1d64459b9c477f91aedb4d723
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://crophysi.ru/aws?utm_term=bksb+english+level+2+diagnostic+answers+2017'. This URL is likely used to lure users into visiting a malicious site, potentially for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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/aws?utm_term=bksb+english+level+2+diagnostic+answers+2017 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_5fe6d33bb302b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453747/normal_5fcba0724269e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469351/normal_5fe90619bbfd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501503/normal_6012256072b53.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/xozeb/tipos_de_avellanadores.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/allied_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/ease_of_doing_business_pakistan_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/69814794002.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/tuberculosis_treatment_guidelines.pdfIn PDF document text
    • http://vovijez.epizy.com/3356994857.pdfIn PDF document text
    • http://gazusoketa.epizy.com/22729120689.pdfIn PDF document text
    • http://kadegezopofog.rf.gd/zumobenokebefabakuluraren.pdfIn PDF document text
    • http://tikisomoxo.epizy.com/9753567946.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/moduzuvujuvegoxafamuto.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/rofinoma.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/dopugokesepiluxolefebe.pdfIn PDF document text
    • http://zavinawotomuvef.epizy.com/16350810277.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/pusupewakoponujabegefaxo.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_off0000f403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF403 6012 bytes
SHA-256: c22c3f7531bfe87f53ab683cc112e53f2d2215258c1a3e16ac733b1c8444b0e6
font_01_sfnt_off00010898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10898 10484 bytes
SHA-256: a23f41c485a794dd9d413fd40513afe1143f851e054a10083d1419976de41a97

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