Malicious PDF — malware analysis report

Static analysis result for SHA-256 813996347bd82de1…

MALICIOUS

PDF

66.0 KB Created: 2021-01-13 20:01:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5bf6592c0d5f2727c58fb97bfbf30b8f SHA-1: caf677599747fe0d26909aa64466361f6fe53763 SHA-256: 813996347bd82de1074471ff5e2b58eec6bc27e603d3004d40e26aaaefddc874
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to a "fallout shelter hack tool apk", suggesting a social engineering lure. The embedded URL "https://traffset.ru/123?utm_term=fallout+shelter+hack+tool+apk" likely serves as a download link for a secondary payload, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?utm_term=fallout+shelter+hack+tool+apk PDF link annotation
    • https://site-1083673.mozfiles.com/files/1083673/factors_of_production_in_agriculture.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424981/normal_5feb1b23af8d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482870/normal_5fca0b5280222.pdfIn PDF document text
    • https://cdn.sqhk.co/zetobazox/kRidjji/8239959294.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368748/normal_5ffb76c2899a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496374/normal_5fb28b5c6f9a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369495/normal_5f95b32d82858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5f9c7903a1bca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f91f121574bd.pdfIn PDF document text
    • https://site-1083772.mozfiles.com/files/1083772/my_ice_hockey_girl_chinese_drama.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/popagexexoza/toastmaster_word_of_the_day_list.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/abecedario_ruso_espaol.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_off0000c6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E4 5040 bytes
SHA-256: 68363d9d8ffcca105c62db1c9a24bd772e2a3a7b97bcca97f9aa84897e343ded
font_01_sfnt_off0000d80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80A 10524 bytes
SHA-256: 742093eda9856708efa2ee5ea05f4639176befc427a39743e9c062fd01090d29