Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a615ee719d1fc8…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 23:40:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7e8a2eb48c798e2daacfe9d21a8e2b1d SHA-1: 56eaa18b21124da17a49a7f1d20045481e7f31a5 SHA-256: 70a615ee719d1fc8e0615e33440268f6fd6a8d2c1e6dbfe54cc1ac2b05021359
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a "Coin Master Hack 2021 Apk". The heuristic firings indicate that these links are part of a known malicious redirector chain. The document body, though partially corrupted, contains text and URLs consistent with a lure for game-related cheats or hacks, aiming to trick users into visiting malicious sites. No scripts were extracted, but the presence of malicious links and the lure suggest an attempt to exploit users into downloading potentially harmful content or visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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-hack-2021-apk-game-hack In PDF document text
    • https://opac.itp.ac.id/repository/oprewards-com-login_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/is-ahmad20218-being-hacked-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-free-net_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-website-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-2021_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005001.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5001 24324 bytes
SHA-256: abf189bb1730a2bc5e44686bd8197102a7699218eb23b10e8c77b20124536a4c
font_01_sfnt_off00008770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8770 3380 bytes
SHA-256: cb8371cc187c45116d0984119c2893dd3db0d7f7d568d007a419406e6ca9f389
font_02_sfnt_off0000935c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x935C 18296 bytes
SHA-256: 0171898879de63f826772f1aaca43c4afb825f5f143e0263167d5c085c4f41c3

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