Malicious PDF — malware analysis report

Static analysis result for SHA-256 b737124fc5f79332…

MALICIOUS

PDF

38.1 KB Created: 2021-06-29 07:09:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0ad19eb7247bbb17b8682607dc6c76fe SHA-1: 50d0d272f29e8a31caa079c1c735fa1a280e5d6b SHA-256: b737124fc5f793329a67425668fe479dbd6bb2f8b7d71ee9dbdb937041eac115
160 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/how-to-get-hat-paclage-roblox-free-2021-game-hack. This URL is presented as a lure for game hacks and generators, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://netcdn.co/app/431946152/how-to-get-hat-paclage-roblox-free-2021-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-roblox-vietnam-war_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-bucks-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-dragon-ball-rage-hack-stats_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-unlimited-money_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-limiteds-com-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/como-hackear-roblox-con-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-someones-acconut-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-clothes-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/pubg-uc-ykleme-hile_GM1330123889.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B1C 23020 bytes
SHA-256: 0fd0b611e7f46d9b78ba57d458ea34b50ed8f6ffa8ee66edf78e368910863254
font_01_sfnt_off00006eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBA 19476 bytes
SHA-256: 81e51379bd3eaec9519eceb6ecf167301b8564fd59e0128029203ef9d36b490a

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