Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20b1f230207609a…

MALICIOUS

PDF

68.5 KB Created: 2020-12-28 21:12:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d220257d2163f3ce1ec7cb50ca98e771 SHA-1: 79b78310c9633335b6ce2f21d72d003e54b70674 SHA-256: e20b1f230207609ad1e98bc708a122f7e4edc1e706791ee6acee9b013dd9e1cc
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://cctraff.ru/strik?utm_term=boulder+falls+mini+golf+coupons'. This URL is likely used to deliver a malicious payload or phish for credentials. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF document strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://cctraff.ru/strik?utm_term=boulder+falls+mini+golf+coupons In PDF document text
    • https://xovosoze.weebly.com/uploads/1/3/4/3/134370725/zavud_lumomosax_panatun_modere.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414695/normal_5fe051d484582.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/8748820.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393904/normal_5fc86bed82c75.pdfIn PDF document text
    • https://cdn.sqhk.co/milibotobov/VzAjgZG/zotiremuvar.pdfIn PDF document text
    • https://puvugemamoj.weebly.com/uploads/1/3/0/9/130969199/mosof-xejezokip-duzola.pdfIn PDF document text
    • https://mosodujisar.weebly.com/uploads/1/3/0/7/130739504/ganexarij.pdfIn PDF document text
    • https://cdn.sqhk.co/palubavuz/Dnycjjn/salagetopatinumufu.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/jivala/drawing_vectors_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xenepedu/83355707015.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_off0000cded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDED 5524 bytes
SHA-256: 96104ed6f08250ce887fe6fc76a1eebf2547ae78b2f4f97ecc1649a7f0025d05
font_01_sfnt_off0000e0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A8 10740 bytes
SHA-256: a056279f0264eebdabccc53967cafaf42e76bec4460ca646ffaa832391053b71

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