Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eaa935c6d9eb520…

MALICIOUS

PDF

49.3 KB Created: 2021-06-03 10:51:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8ac256ea1ddfcf48f87b29143a105b71 SHA-1: 2df9d84a0933305964bb6efb77e25dfece15795a SHA-256: 7eaa935c6d9eb52098125decb6964fc279eee60a945bd6b2fec5c638ebef1b5c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, specifically promoting 'free Robux' and 'game hacks'. The heuristic firings indicate that the PDF is designed to lure users to malicious sites, likely for further exploitation or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to execute actions or redirect the user, aligning with common phishing and social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/431946152/how-to-get-free-robux-game-hack In PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/easy-points-gg_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_off00004ffd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FFD 28100 bytes
SHA-256: d06488ee9e1729259b2438b20d4f7990d8ba670a4095f22e2c8f7f558190ad11
font_01_sfnt_off000090c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C5 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD7 18280 bytes
SHA-256: 2eeeedfcb2f224ab556fa0ab031baeab03f86dcbcf90e3baaaf5b6d88536dec3

Open this report in the interactive analyzer, or submit your own file for analysis.