Malicious PDF — malware analysis report

Static analysis result for SHA-256 02892cf6cc8e0183…

MALICIOUS

PDF

34.8 KB Created: 2021-07-08 14:18:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 37216625ae0f4827844aa5095902ba56 SHA-1: d607059a35cd28b5ebb557f3595f39fdfad5bd41 SHA-256: 02892cf6cc8e0183d0a2494b4d5c5c4b44ce31acb06df09d47646a5e6ed48dcd
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/free-robux-codes-2021-on-phone-game-hack. This redirector is likely used to funnel victims to malicious websites or download further payloads. The document body and heuristics indicate a lure related to game hacks and free currency, a common social engineering tactic. No scripts were extracted, but the embedded URLs and redirector behavior strongly suggest a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/free-robux-codes-2021-on-phone-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/como-hackear-roblox-adopt-me-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hack-book-of-monsters-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/redeem-code-for-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-a_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hacking-2-step-verification-for-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hack-the-robux-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000321d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321D 21752 bytes
SHA-256: dba5a1ad3aa6dbd805e475886b4034559e141cadcb79db0a94c0bf43fa96ea30
font_01_sfnt_off000061e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E5 19424 bytes
SHA-256: b32b960c64de2b67353e43035cc691b0f1e10e8c8bba616799879cd51c2bf4e2

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