Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f282f201656cf9…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 22:03:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 980d0cbbf9fb27423ea9590b6216de56 SHA-1: bb03581efe7b7aef6c03a3754b449b076dfa4f5e SHA-256: d7f282f201656cf93ee77ff193fd3cc17d4e279c141dddc9407c14fabd22af27
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites that promise game hacks and free in-game currency, such as Robux. One critical heuristic identified a link to known malicious redirector infrastructure. The document body and extracted URLs strongly suggest a lure for users seeking cheats or exploits, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-to-hack-someones-roblox-account-game-hack In PDF document text
    • http://mbbs.hr/files/free-robux-no-human-verification-or-survey-ios_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/r67-roblox-hack_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/descargar-hack-roblox-sin-virus_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/rbx-earn_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/fbchampion-com_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/cheat-roblox-tire-dans-les-mur-sur-phantom-forces_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-account-for-roblox-infinite-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-backdoor-hacking-roblox-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/robux-apk_GM431946152.pdfIn 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_off00003033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3033 22040 bytes
SHA-256: a7acde65b90c1203ce1cbfaa968db8b4d26ef146f176b879fd353621a4e56777
font_01_sfnt_off000060fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FA 19324 bytes
SHA-256: 64c0d96001d8dfb5bf7499830987bf6c9de47f878144bc2b65d78747ca645951

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