Malicious PDF — malware analysis report

Static analysis result for SHA-256 edeb73796fc44e49…

MALICIOUS

PDF

49.5 KB Created: 2021-06-03 05:35:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: cf38669a95de594d79ba33c629ff9f4d SHA-1: 72415024f1548159c0bf76b81f6a5711ebe06c92 SHA-256: edeb73796fc44e4995eee7bd030fde2a251fe6ff6a02a70e27afebf8cc4b3866
200 Risk Score

Malware Insights

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

The PDF contains multiple links to redirectors and malicious infrastructure, masquerading as game hacks and generators. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to execute a command, potentially to bypass security measures and download a second-stage payload. No scripts were extracted, but the embedded URLs and social engineering lures strongly suggest a malicious intent to trick users into visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/minecraft-windows-10-edition-unlock-full-game-free-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pokemon-go-free-60fps_GM1094591345.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-survey_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-email-free-spins_GM406889139.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_off000056b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56B5 26120 bytes
SHA-256: 4868a8dcb376e96639e89b9a4f89aa0a22f1e62ea8eb227527cb79619535b5c4
font_01_sfnt_off000091d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91D6 2940 bytes
SHA-256: ae8acc7f13e86db3aed98d7dfb73e70e16f4dedb45e9f0467460b76f54e1a1bb
font_02_sfnt_off00009be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE4 19356 bytes
SHA-256: 614bd227759a0900337b007d73888638d95591a994554acf55d00d578ccef1d0

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