Malicious PDF — malware analysis report

Static analysis result for SHA-256 be6caadcd0096d72…

MALICIOUS

PDF

34.3 KB Created: 2021-06-30 03:53:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 537ff9c378fa9ea0ba1b3f1a48a1ebca SHA-1: a1fffd6a4b2e707256e241794ed19b86e93068c1 SHA-256: be6caadcd0096d72e7131466c88b34015e6461bdae1b08c4d702a0bb134fbd07
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains embedded links that redirect to malicious infrastructure, specifically targeting users with lures for free game hacks and generators. The presence of a malicious redirector link and the ML classifier's high confidence score indicate a high likelihood of malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to exploit users into visiting malicious sites, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-folder-game-hack In PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/follow4follow-free-followers-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-mad-city-cheat-engine_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-free-level-7_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/www-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/arsenal-roblox-hacks-pasebin_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coins-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-free-roblox-items-using-coding_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-template-free_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/robux-now_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/wild-and-free-serena-ryder-id-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3F 22304 bytes
SHA-256: dd5d584431bc33f84803dc5f6317c28e258f9f4c9a507a601ee21129d711fd69
font_01_sfnt_off0000610d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610D 18964 bytes
SHA-256: 83a6c28f9c3f256385ea657783923e2ff691a05a639ce0ef87dbf80e76656220

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