Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12db63c87adafbc…

MALICIOUS

PDF

35.3 KB Created: 2021-06-26 16:29:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ff4ae7955a6738d9872c27ae131b5abd SHA-1: 1a1ed830bedaaf9cb872e630206ea9ed77c84d21 SHA-256: a12db63c87adafbcb7e262f4e24d4aaaf3945cd847acd25f52ad7e09b96c0431
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically identified as a lure for game hacks and another pointing to known malicious redirector infrastructure. The document body, though partially garbled, contains references to 'Roblox Flame Cheat' and URLs related to game cheats and free items, reinforcing the lure. The presence of embedded URLs and the nature of the lures suggest an attempt to trick users into visiting malicious sites, likely for further exploitation or malware delivery.

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/roblox-flame-cheat-game-hack In PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/rbx-com_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/getrobux-info_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-download-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hacked-clients-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/pokemon-go-free-dragonite_GM1094591345.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-inmortal-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/robux-no-survey_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000323c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323C 22636 bytes
SHA-256: 20bec9ae7a5b7ace991da6e069353a1e47f3acce256c8ee0d646cc2d586fa53f
font_01_sfnt_off00006489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 19180 bytes
SHA-256: 90ca16083096c49af87bcffc3006921c7dff860062026d84480f796ad82db0b2

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