Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8eb0d0bcd8f010b…

MALICIOUS

PDF

66.4 KB Created: 2020-12-01 02:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b970a851d2082432c652889cec32e82d SHA-1: 2476a1d8d2f3151d01ce837af2805e427f1139b2 SHA-256: d8eb0d0bcd8f010bc308c8994e31db59faa51c9c6ea671e18e0b2c3d8bea0c08
174 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/aws?utm_term=opera+browser++for+windows+7+softonic'. This URL is likely used to deliver a malicious payload or redirect the user to a phishing site. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing/malware delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/aws?utm_term=opera+browser++for+windows+7+softonic In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_5f98d807414e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5fb9e409d505e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403264/normal_5fb2777f7c13e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408475/normal_5fa4636d23fed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_5fbdc96c780d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418574/normal_5fb4c2476b4ec.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/rizijubovapuk/mossy_nissan_escondido_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/066814a0-002b-4a31-b483-e27c849f69d2/puwoj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc375e3ab79f442f239d171/t/5fc58a27a97599144eb7170d/1606781479730/ladesuxerubojeru.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/local_tv_guide_austin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50ab95687f52b6b9bd685/t/5fc580a561e25426e1f38826/1606779045518/46185843275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ed7d87-62a5-45fd-bd14-c248dd49b4cf/befitipajeb.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/gelogopuvapodexawudopo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e4a011f6a41984859e8d/t/5fc55d6be6d49a06bb4672d4/1606770027655/jepujomizevavazina.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_off0000c6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C4 5456 bytes
SHA-256: 8c91e9dd7d2453fa749e0a25dcb54e9578e453537a6c1563a3344e5858a4166d
font_01_sfnt_off0000d972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD972 10480 bytes
SHA-256: 3fdef804cc1ca69ac22334cf81a12c80853acfd339aa9895e8af94cdcaf9c968

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