Malicious PDF — malware analysis report

Static analysis result for SHA-256 e57176a1947a8154…

MALICIOUS

PDF

34.5 KB Created: 2021-07-09 15:17:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 87f1098f069f2b2fe3614477a70c61c1 SHA-1: 7c4ab92f2a7380b1b24ed31a7601761167f15513 SHA-256: e57176a1947a81547412d9bec4c32654fd22e2389401412c74a39d52b08642b2
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users to external sites, many of which are SEO-optimized PDFs related to game hacks and free currency. One primary URL, http://netcdn.tw/app/406889139/what-is-coin-master-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a phishing or scam attempt masquerading as a generator or hack for popular games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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/406889139/what-is-coin-master-game-hack In PDF document text
    • https://www.cinemapalace.ro/trailer/files/hax-teamcf-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/can-you-get-banned-for-using-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-hack-roblox-ac-counts_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-livr-emerald-giveaways-roblox-direct_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/code-de-triche-roblox-hacker-rpg-world_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-not-fake-2021_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/does-roblox-employees-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-dragon-ball-z-final-stand-level-hack_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-hack-roblox-2021-march_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-create-your-own-roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/robux-generator-com_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
stream_002_off00003132.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3132 22800 bytes
SHA-256: 212c6306ea7f454c17347a17b3417be73cbc2e17fe35c9ff6ea85112d34e7fad
font_01_sfnt_off00006440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6440 18200 bytes
SHA-256: 072b1ce0207048645576006b460be3f776d19325a872e8f1f343080954e13cad

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