Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f948f6e87983b41…

MALICIOUS

PDF

33.5 KB Created: 2021-07-04 00:07:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b900c95003074de3076740b1fc046d2e SHA-1: e180ea7c6d28f80a3affc4085041295fe6d2761e SHA-256: 3f948f6e87983b41763ac2a0810191327130fed4d99e373657206c858b875a9e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links that redirect to potentially malicious infrastructure, disguised as game hacks or generators. The primary lure is a link to 'how-to-get-free-likes-and-followers-on-tiktok-game-hack', which is hosted on netcdn.tw. This indicates a phishing or malware distribution attempt, likely using social engineering to trick users into downloading further payloads.

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/835599320/how-to-get-free-likes-and-followers-on-tiktok-game-hack In PDF document text
    • http://apartmani-mestrovic-krk.hr/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-accounts-free-robux-and-obc_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/dungeon-quest-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-hack-roblox-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-get-all-gamepass-items-in-roblox-nypd-free_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/gift-card-hot-generator-hack-robux-codes-hot_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-get-items-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/cheat-in-parkour-roblox_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-roblox-clothes-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/no-virus-hack-roblox_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_off000030e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E8 21456 bytes
SHA-256: 91350c07f32ec1f4dcbbe025e83ce9199b7b8742ca6082abec83458256d9cfe3
font_01_sfnt_off00005fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE1 18384 bytes
SHA-256: bfd4ceef857bbe1941bb11a9ec01acc9821a6429d34ac257a0692807faae67cb

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