Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db6eb950dcf5e2a…

MALICIOUS

PDF

112.3 KB Created: 2020-11-17 01:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c09378790d6f30d5cd1dcc9680c8047f SHA-1: 15a5f30da8c1218bc82db9a5c22be5059b4dd81e SHA-256: 1db6eb950dcf5e2ae42a8e04fe075f8e5e3d356eab8b528171ae389d89912f4e
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to known malicious redirector infrastructure. This suggests an attempt to lure users to malicious sites, potentially for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • 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/strik?utm_term=salton+jewelry+spa+cleaning+powder In PDF document text
    • https://wudizibi.weebly.com/uploads/1/3/4/4/134477582/6e5fd26.pdfIn PDF document text
    • https://jomefibid.weebly.com/uploads/1/3/4/5/134596324/f7eeabc33d41b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2467dfeb-6bc9-4ee1-8e3a-ad97d5f7ddf4/degonomini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4aaf04-a1d7-4098-8c55-2a134de22f4e/7387581814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0684606f-c838-4871-b221-ac7c22cb8f01/43895131162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1cc63cc-9970-4f31-8505-e27726d1567f/mesodasuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba04328-4b2f-4f79-b02e-9c364f121e9e/hostname_does_not_match_certificate_filezilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a71cd3-d480-47d3-824e-b6ea0eb14732/84644903112.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/dbt_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db84b57d-9a91-4bc7-8db7-28f7a3aacdc1/mezefi.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/padebojufu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15159 5400 bytes
SHA-256: 29cd0a99225d44186dceddfa4b2f0491de6a9d0f55128124a794064c1895b34d
font_01_sfnt_off000163d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163D2 11484 bytes
SHA-256: 93131953f4f444f65390237364a0dab7572b6dc6bcf4553e4ea84caf3749a000
font_02_sfnt_off00018b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B17 17568 bytes
SHA-256: 07da33e147007b9e86d44df0fecdeee65b578dac133dceb77380486cba337a52
font_03_sfnt_off0001a58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A58A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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