Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a8d2b455d3bb87…

MALICIOUS

PDF

74.5 KB Created: 2021-01-10 12:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1007df53d2465996a9e098131a55a0bf SHA-1: 46eb50fc53b333025cb0dbd87abd13bf605ac905 SHA-256: 10a8d2b455d3bb870fe381e5b1d8cced500bfd07626f311321d1765801916d7e
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to `https://gettraff.ru/aws?utm_term=camp+x+ray+full+movie++480p`. This heuristic, combined with a high ML classifier score and ClamAV detection as `Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0`, strongly indicates a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata suggesting it was generated by `wkhtmltopdf`, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://gettraff.ru/aws?utm_term=camp+x+ray+full+movie++480p In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446260/normal_5f9e47a8afecf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407066/normal_5fc7452076524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410988/normal_5fc0320bef3a7.pdfIn PDF document text
    • https://site-1171796.mozfiles.com/files/1171796/17751048598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450048/normal_5fe80778f3381.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/UZlhjWO/gacha_life_2_release_date_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f89c6bfba61f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_5f92aad77add8.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/UcNdgdl/paxabejonekogisav.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/gfhhifi/naxavaboremexunaled.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5fa9306b699b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413007/normal_5ff8653c27083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450634/normal_5fcdb7d4752da.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/HyjfGhc/warrior_cats_redbubble.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/cibLgjI/game_of_thrones_ringtone_for_iphone_8.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/jhje9hi/23834476829.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_off0000e71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71C 5428 bytes
SHA-256: e0a08c032bd53eda69b8c3cd9f55eae2ae5b23d67510d93207dd3a6dedca1521
font_01_sfnt_off0000f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 10300 bytes
SHA-256: 13ba2331b04ef7a4c56c2dd7d2ec979691de32a55c9f8dd14de00f0ea8043be5

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