Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab1c812f2ee4729…

MALICIOUS

PDF

37.1 KB Created: 2021-07-08 22:52:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b791c3c6bc2681e6b4249ff7aa3e811f SHA-1: 03e5c7a3d45fd59d1fb718c84510c20cfe707a45 SHA-256: 7ab1c812f2ee47294eae11935465de35971de882e6bdedf553493087b98375c2
160 Risk Score

Malware Insights

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

The PDF contains links designed to lure users into clicking on a 'free generator / game hack' URL, which is hosted on known malicious redirector infrastructure. The document body and embedded links suggest a scam related to in-game currency or hacks for popular games. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a potential for exploiting vulnerabilities or redirecting users to malicious sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/406889139/coin-master-free-soins-game-hack In PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/como-hackear-ropa-en-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/hack-para-dragon-ball-super-heroes-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021-real_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-free-cam_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/hacker-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_GM406889139.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_002_off0000327a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327A 22544 bytes
SHA-256: 81215924d1714c27ad74add95fd211e888a2768953c94aac0f109ecfb8023bdd
font_01_sfnt_off000064ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EA 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECF 17996 bytes
SHA-256: f4306de497449c0c0250de5deec7b8066a87c54091f9de3abe5accc399ec3ddb

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