Malicious PDF — malware analysis report

Static analysis result for SHA-256 449aaafc78d30ad5…

MALICIOUS

PDF

42.1 KB Created: 2021-05-22 06:36:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 43f13ead283aec4cb316e5a1819b5878 SHA-1: ec8dc4ee779cd7b5e5dd366201bc48986de97e65 SHA-256: 449aaafc78d30ad5b9c3f692ebeb919c1744531326c8f6e90a598df233a9f2a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators'. The document body and heuristics indicate a lure to download or access a resource via these links. While no scripts were explicitly extracted, the nature of the links suggests a potential for further malicious activity, such as downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7429

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • 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
  • 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://netcdn.xyz/app/431946152/how-to-hack-roblox-accounts-game-hack In PDF document text
    • http://gornjastubica.hr/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-robux-net_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35B3 28292 bytes
SHA-256: a47d821bb06a62464eed0b5276c6d5debafa32a04fe003f544ed11d7809c0b66
font_01_sfnt_off0000783a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783A 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00008236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8236 18588 bytes
SHA-256: 7bfa318362f39458d7d6cfaed4b7fb6212c616d22e88bbb7e9e73b07c323fe95

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