Malicious PDF — malware analysis report

Static analysis result for SHA-256 57cb777e249458ff…

MALICIOUS

PDF

35.4 KB Created: 2021-07-09 12:31:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d90d6cac2dd983fab42fe12d530356d9 SHA-1: c92516d2e370a2088d7d0a6f4adfc8989e3790ba SHA-256: 57cb777e249458ffc44d761a27d0d3773f9abd5838c4fc2480f494ad560b26a7
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to appear as game hacks or generators, with a primary redirector at http://netcdn.tw/app/406889139/how-many-levels-are-in-coin-master-game-hack. The document body and heuristics indicate a link farm strategy, likely to drive traffic to malicious sites or potentially download further payloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/how-many-levels-are-in-coin-master-game-hack In PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/speed-hack-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/free-punch-animation-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/roblox-free-robux-obby-by-elevanoz_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/roblox-free-admin-tc2_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/how-to-insert-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/how-to-get-private-servers-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/how-to-get-roblox-plus-premium-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/hack-people-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/video-de-roblox-hack-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/boys-roblox-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/free-robux-no-human-varucashe_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/counter-roblox-offensive-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/free-robux-hack-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/minecraft-free-online_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_off0000337e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x337E 23076 bytes
SHA-256: 272fca514e0b5ec0e6f8ff7f661605559e8ef21859c488a3e2d08017444bff15
font_01_sfnt_off0000677e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677E 18368 bytes
SHA-256: a3184096f73a5c849ec1e48a1332c6008fb783e1a923439299745952a2be3950