Malicious PDF — malware analysis report

Static analysis result for SHA-256 a333b477867791c4…

MALICIOUS

PDF

71.5 KB Created: 2020-12-27 07:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 461fd17739821fe6e628c8b0a2c7712b SHA-1: e78754e52d2bf0a40cf96dc8ddbe1747b7086519 SHA-256: a333b477867791c4347157dea6a83afb9c13ea5a7449581383c70e216914b43d
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to reference 'Garena free fire booyah day download apk', suggesting a lure to trick users into downloading a malicious payload. The presence of embedded URLs and the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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=garena+free+fire+booyah+day+download+apk In PDF document text
    • https://sifajovu.weebly.com/uploads/1/3/4/8/134874608/gonagalobunetedo.pdfIn PDF document text
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/798173.pdfIn PDF document text
    • https://jibuzuku.weebly.com/uploads/1/3/0/7/130739289/8456903.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/tawosutosuxi/luludiresegovozire.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/wokigaribibufifixevo.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/ropowakokisaza.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/minetest_free_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dac94e2-6870-4334-b412-c862c8cde785/86116846857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/667fb6b1-5126-4c15-9459-66fc9b5f8b32/zilimepesagadixejuneg.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/ge_x5_camera_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/26234998505.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FD 5380 bytes
SHA-256: 01018f23119e3472aa26fbd614f721db8c62e868612f004cbedff11d8ef8cb86
font_01_sfnt_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 11500 bytes
SHA-256: cac6d71e33dd630a1545b01c5f76d7d57e44f9acf61931b7feaee98c291c0854

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