Malicious PDF — malware analysis report

Static analysis result for SHA-256 5994e29b88830db5…

MALICIOUS

PDF

50.1 KB Created: 2021-06-09 05:21:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1a950bba98721a50adb764f4fd5da277 SHA-1: 809a558af9ea29fef5e188a98423d388f699fca0 SHA-256: 5994e29b88830db54ceffc19b503a73987b778a733b1a7ae218ff2ae86ccfe4c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/free-robux-windows-7-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id//repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/get-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/wurst-mc_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/114-4-hacks_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/is-there-a-way-to-get-free-pokeballs-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/promo-code-hack-for-robux_GM431946152.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_004_off00005539.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5539 26924 bytes
SHA-256: 1f49366faea337caeed6c363f3367785e878c383bb5ead54f1ad1c602b504f13
font_01_sfnt_off00009328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9328 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD0 18728 bytes
SHA-256: 037a4682135632075f4f038267d4fa361b503e2a983e2dc4edec23fd486d3dc4

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