Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2644c9a139f3c7…

MALICIOUS

PDF

47.1 KB Created: 2021-05-17 02:13:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f22c1b16a4845dbf5295408bd752ab97 SHA-1: 3f9aaff3200af4c86dca9e1d508579fd4c0af799 SHA-256: fe2644c9a139f3c752e98f0de90b4ebf745e725d69fbd15e58716b00a2eccde0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and a document body that explicitly promotes a 'free Robux' generator, a common lure for scams. The primary URL identified, https://netcdn.xyz/app/431946152/free-robux-card-codes-game-hack, is flagged as a malicious redirector. While no scripts were extracted, the PDF structure and heuristics indicate a malicious redirector designed to trick users into clicking the link, likely for financial gain or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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 https://netcdn.xyz/app/431946152/free-robux-card-codes-game-hack In PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-free-gold-cards-on-coin-master_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_003_off00004d31.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D31 27796 bytes
SHA-256: 2bed635a0ca27aa29b3fffb2c4d38e044e35adb6cc89c2a03eeb59adca6a4603
font_01_sfnt_off00008b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6A 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off00009521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9521 18416 bytes
SHA-256: 79c56a0f23d4fc34690a575a065be14b64911c3c5a3331038291264b4b7107af