Malicious PDF — malware analysis report

Static analysis result for SHA-256 691da7f123771dc1…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 05:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9dd029c7ae152f778a15bc67ddb3bb58 SHA-1: fcca79353dca569e5d13061b5bc3253763ef21f4 SHA-256: 691da7f123771dc18c20bc2b5b834b45a3333b64b4cbf468abd75855213669f4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free coins' for games like Coin Master. The heuristic firings indicate that these links are associated with known malicious redirectors and lures for free generators. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into visiting potentially harmful sites, likely as a first step in a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/406889139/coin-master-free-coins-links-2021-game-hack In PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/pokemon-go-free-play_GM1094591345.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/give-me-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/pubg-in-uc-hack_GM1330123889.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-images_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ffb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FFB 25416 bytes
SHA-256: db874d9fd29b2b03942d859743d0a2534b77a24dd5b37156911766b03ac45e63
font_01_sfnt_off00008a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A53 3400 bytes
SHA-256: 75c3a8e6f5c68e0746f893c922e57fd7e888a21fb038f9ae3eedb0a197a59e24
font_02_sfnt_off00009577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9577 18284 bytes
SHA-256: be459003f2db1a934c49859962f2962ce704e042ee0985c73311b64c11e09449

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