Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0cb07c47bfda01b…

MALICIOUS

PDF

79.5 KB Created: 2021-02-11 05:22:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4e0bf3ac2001281460507c304a1ac2bd SHA-1: 984cb009ebcc53372614695744ef0fa53caff277 SHA-256: f0cb07c47bfda01bc770acd04c1ecfaa2178a1795c9e6a0b27a9139be66b579c
154 Risk Score

Malware Insights

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

The file is a PDF containing a malicious redirector link to 'https://crophysi.ru/aws?utm_term=ellen+degeneres+pronunciation+guide'. ClamAV and ML classifiers also flagged this PDF as malicious, specifically identifying it as a phishing or trojan variant. The presence of embedded URLs and the critical heuristic firing for a malicious redirector strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=ellen+degeneres+pronunciation+guide In PDF document text
    • http://conicppjry.bid/pafanezovidixetenubemirtjcy8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488581/normal_601c0345dedf0.pdfIn PDF document text
    • http://avbox.org/twistee_treat_hours_goldenrodk7koo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485322/normal_5ff97bffb3436.pdfIn PDF document text
    • http://trikotoria.ru/satitogevawajenijudajuvu1jle.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/wusone/baixar_barbie_dreamhouse_adventures_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/guided_reading_levels_chart_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/kolisowixam.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/guidelines_for_colonoscopy_sedation.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/trastornos_alimenticios_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/el_bullying_escolar_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/bajaj_allianz_car_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/wofobemefinasilujepuzexo.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/12551126150.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/mcgraw_hill_answer_key_grade_5.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_off0000fa03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA03 5200 bytes
SHA-256: 854527c16ed07bc5476e245647f62d8ea1715f2637bd4c1bc8bbb8008c884a16
font_01_sfnt_off00010bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC4 10896 bytes
SHA-256: 81af1d53a0fa0773e72a4b6a9b0646ae1f3f441233e7be6d125849fa2174b11d

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