Malicious PDF — malware analysis report

Static analysis result for SHA-256 c01a9b478cb771f5…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 12:28:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: af698c196cd5564b6acd88b2a9ef5919 SHA-1: ab14e3d4beab63bc016976199750a99ac63e26eb SHA-256: c01a9b478cb771f5361b84a4988a8d34143c464cf23d235159d306f988ecabe5
82 Risk Score

Malware Insights

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

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, which is a common lure for malicious downloads. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially garbled, contains the primary malicious URL, suggesting the intent is to trick users into visiting this site, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/406889139/free-spin-and-coin-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-free-80-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/exploit-roblox-hack-2021-octubre_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/ser-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-you-hack-on-roblox-assassin-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-no-apps-needed_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-seraph-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/dragon-ball-final-stand-hack-stat-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/aplicacion-rusa-para-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/bleu-roblox-mega-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-absract-free-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-getter_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_off00002e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E84 22108 bytes
SHA-256: 4c09a3badf270aae4862f2c3337b53a3f0f0fecee4f837269cf9340d76d6da6d
font_01_sfnt_off00005f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F58 18244 bytes
SHA-256: 1760058a9b4ac65e75107fdb05ced4e329212cd08f375451f5a371d24b39a496

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