Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eadb4a6f69c9f09…

MALICIOUS

PDF

49.1 KB Created: 2021-05-18 01:07:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8c7fbbbc136e39cfdddc48fdb06eb3eb SHA-1: 56564f229c7fd4887e7fcdf50f1005d29ec249d3 SHA-256: 9eadb4a6f69c9f0992012128ca23bb36db964057a149fd64c604df23932d074d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users with promises of free in-game currency and hacks, such as 'how-do-u-get-free-robux-2021-game-hack'. These links point to redirectors and other PDFs hosted on domains associated with malicious activity. The document body, though partially corrupted, also contains similar lure text and URLs, reinforcing the phishing and redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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 https://netcdn.xyz/app/431946152/how-do-u-get-free-robux-2021-game-hack In PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/what-is-wurst_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/free-roblox-glasses_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_003_off00004aeb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AEB 28016 bytes
SHA-256: 4999f7c75eb0de8dc596b6f00fa2d4614aac4d0ce6a3a0c3afc022483facdd61
font_01_sfnt_off00008af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF4 6700 bytes
SHA-256: ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27
font_02_sfnt_off00009b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B32 19040 bytes
SHA-256: 14ed63897d8c38c9b74f4ae6c685ddc963b8153977262fdb6411d06658c720a7

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