Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7157f23ae03072d…

MALICIOUS

PDF

34.0 KB Created: 2021-06-28 20:33:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1c329c55728f87a2e330bc845998f761 SHA-1: c67961c11b64277b5c8fad91da79c9eb1e3e495f SHA-256: d7157f23ae03072d5ebea74d387aa2a07343ed9eee5e908626aa02a861192fe1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating an attempt to drive users to potentially harmful websites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URLs and heuristic firings suggest a phishing or social engineering attack.

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-placerebuilder-cheat-engine-ban-game-hack In PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-chat-hacks-grab-knife_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/slerp-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/newo-ico-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-roblox-accounts-2021-december_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-friends-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-for-kids-age-9_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-roblox-without-a-app_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-card-codes-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/www-coinmaster_GM406889139.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_off00002f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F10 21920 bytes
SHA-256: 9f45e4403e4b3e27c960ecfeedb1a45bdba71ec604adf0fb5c8321a23dc20d5a
font_01_sfnt_off00005f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F14 19344 bytes
SHA-256: 40c8716ce25e490aa5f9831e107a6768bc6be8fa633368afe53330fbaf11bc0c

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