Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb708afe0d65df9…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 15:08:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 059199946c58bd662d22a34806588342 SHA-1: e0d6625e43d7d097c31dd44b26bd67a33a151ba1 SHA-256: ceb708afe0d65df904369aac1610119a810b32e37fd366daf48926c1ee836f15
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, employing a 'free Robux' and 'game hack' theme to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts a large number of SEO-optimized links pointing to various scam pages related to games and in-game currency. The document body contains text and URLs that reinforce this deceptive theme, aiming to drive traffic to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/free-robux-meme-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-codes-little-mix-roblox-id_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-zombie-attack-cheats_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/addrbx-earn-free-robux-by-doing-tasks_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-admin-in-any-roblox-game_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/future-free-roblox-exploit_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/parkour-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-no-survey-or-verification-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-engine-roblox-bypass-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-items-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-can-someone-hack-my-account-with-username_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/tiktok-minecraft-hacks_GM479516143.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_off00002a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A03 22412 bytes
SHA-256: 02ec23f0cb67b3512114a9de5f24a64532aa06dfaef0dac760f39b2a51d23ddb
font_01_sfnt_off00005c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3A 19172 bytes
SHA-256: cc6f39551398ec7556c1100a0df569da4eadcef96f4621f512d193548eed02ae

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