Malicious PDF — malware analysis report

Static analysis result for SHA-256 911d9f679d53a5ca…

MALICIOUS

PDF

35.9 KB Created: 2021-07-04 01:47:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bdef42b6c8a98024dc20039a2df371d6 SHA-1: 21c45407bf933be9a1626ab3d9491ac3056a62b0 SHA-256: 911d9f679d53a5ca89f0b098909beb7716e3c813b9721ee298a0353b49a890e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector URL, which is flagged as malicious. The document body and embedded links suggest a lure for game-related cheats or currency, a common tactic for distributing malware. Although no scripts were explicitly extracted, the PDF structure and malicious links indicate an attempt to redirect the user to a harmful site, likely for further exploitation or phishing.

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.tw/app/431946152/free-robux-hacker-us-game-hack In PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-noob-pro-hacker_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-village-3_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-guest-shirt-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-hack-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/bird-simulator-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-games-to-download-like-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-cheats-computer_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-today_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000339c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x339C 23192 bytes
SHA-256: 0c3e6888e97c332d8d76d2401e23d5c1c2256eaeaecff89865d44cb4e989d8ab
font_01_sfnt_off000067e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E5 18884 bytes
SHA-256: bfc674629a4fdfc233a3c1a19cbee54387e60bd0cdfc4a3107778b42d9fa82d8

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