Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb322b7cbab18ce…

MALICIOUS

PDF

70.5 KB Created: 2021-01-11 14:46:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 827337355c8a969b9c8cb7972686fc66 SHA-1: af1df6b6265dcf70059678fd3a59ce5c96834eab SHA-256: beb322b7cbab18ceed1ed9c1747d5b608c185d89ab4ae16e158ee568d2842603
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • 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.
  • 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.
  • 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://traffking.ru/aws?utm_term=dynamics+ax+2012 In PDF document text
    • https://cdn.sqhk.co/nawafoxobok/xjidHaU/parents_kit_ad.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/eqKjjnC/tugul.pdfIn PDF document text
    • https://site-1195783.mozfiles.com/files/1195783/flip_a_coin_100_times_results.pdfIn PDF document text
    • https://bixivotanaxifu.weebly.com/uploads/1/3/4/4/134449973/dutuliduzopalelin.pdfIn PDF document text
    • https://watinadapazibe.weebly.com/uploads/1/3/4/4/134492378/c91ff.pdfIn PDF document text
    • https://razosuxox.weebly.com/uploads/1/3/4/7/134719946/5379619.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/2996529.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxarufodir/4PFoBFI/91323897301.pdfIn PDF document text
    • https://tepogixe.weebly.com/uploads/1/3/1/4/131437844/6221085.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DA 5312 bytes
SHA-256: 7433048b9c29a406153d756d4f8ab265e44b4de100ea31a0898c30685123ab76
font_01_sfnt_off0000e6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F6 11616 bytes
SHA-256: 812e6f7b13a86ceef6d9431e3c390a0266c640131c495637d89594214a0f09c0

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