Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0b3ccafcbc75aa…

MALICIOUS

PDF

71.9 KB Created: 2020-11-20 07:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a8211fd53a928f971f9a93109dcf3f20 SHA-1: 2e1706e6d4f3a806d80caa1b80b1f5cb9f22f918 SHA-256: ac0b3ccafcbc75aa4a5422fbe8c0748cb0d1e13dd118065054479726573e789d
222 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 a URL that attempts to trick users into downloading software. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, suggesting a phishing or malware distribution scheme. The ML classifier strongly indicates maliciousness, and ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=download+photoshop+cs7+portable+full+version In PDF document text
    • https://zosopomejunij.weebly.com/uploads/1/3/4/0/134040517/d6d907b39ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f9cfe0c927fa.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/jububij-fuvozuzav.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/4698636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5f8d8298cefc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403533/normal_5f99beedc0f50.pdfIn PDF document text
    • https://mesifadenox.weebly.com/uploads/1/3/4/1/134108947/6191335.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b7083a-1169-4c99-8e4f-3b98e1bd5f72/chinese_childrens_books_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e4f9d81-ee9e-419f-9a12-010b65e23021/dewalt_dw703_miter_saw_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/714c5b57-78bd-47ae-97f1-1c8a86c92c62/paratonososoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85087561-fbc1-4bfb-aec6-0078e290be95/86412993647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a311bf2-c213-4ea9-92b3-c6762bad490f/vewuxuvi.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_off0000daed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAED 5612 bytes
SHA-256: f805fdbb608a027101bfc6c8477b00c1bc13f529780aa4d9fe8db65b9f07b973
font_01_sfnt_off0000ee20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE20 10716 bytes
SHA-256: caaf3d6885cb9768b7bdba6df1616728b813abe8fb798fc2bd143d4350fdca98

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