Malicious PDF — malware analysis report

Static analysis result for SHA-256 96656debfc35880f…

MALICIOUS

PDF

73.6 KB Created: 2020-12-24 13:10:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6c132df4a41ae69686f3275e68b8be8e SHA-1: 88c19ce6fd7a626baa2bdebb1898ca2c056480f0 SHA-256: 96656debfc35880f7b50f11d313213a662252906510d54d4e9136e3bb015a6fc
244 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains multiple links to external websites, some of which are identified as malicious redirectors. The document's content, though heavily obfuscated, appears to be a lure for 'Bloons td 6 hacked towers', suggesting a phishing or malware distribution attempt. The presence of numerous links to disposable hosting and redirector infrastructure indicates a coordinated effort to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/strik?utm_term=bloons+td+6+hacked+towers In PDF document text
    • https://static.s123-cdn-static.com/uploads/4468551/normal_5fcdf68029558.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/TgeoLQr/todotebapogagobivu.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/0c648a216de548.pdfIn PDF document text
    • https://rawogozanukej.weebly.com/uploads/1/3/4/6/134623914/momusapovafagizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f8be078bafea.pdfIn PDF document text
    • https://losasogewago.weebly.com/uploads/1/3/1/4/131437886/fd64e666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5fd0ad9028989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383680/normal_5fa94130eb51a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_5fdbd3ca2e2b6.pdfIn PDF document text
    • https://vixalabalu.weebly.com/uploads/1/3/4/3/134396729/guboganosanuj-wabibinefu.pdfIn PDF document text
    • https://bexizesuxeneze.weebly.com/uploads/1/3/4/6/134634073/3534381.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/iJrUgiM/16720223485.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/vavebufevodutob/behringer_truth_b1031a_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/4k_video_wallpaper_for_android.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_off0000e3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B3 5388 bytes
SHA-256: f0cde0a666043bae01ae848e07aa03b57b48816348fb2c36b56cd08c756e3465
font_01_sfnt_off0000f60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60D 10492 bytes
SHA-256: 0a6cdfb3945eac1fbadd66df45bb672cd828f73c55ba5bf23d7f087d4366fa87

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