Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad8f28d65e459fb…

MALICIOUS

PDF

33.2 KB Created: 2021-06-26 01:49:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a6bb0319977982783fbf7a6c2ec35ca8 SHA-1: 8d1f5a3826fee82243bad1f88fcf47c011cc8076 SHA-256: bad8f28d65e459fbfab832ba96ec600c9eb723c34e469261f87504ec0b8e5f29
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically promoting "free generator / game hack" lures. The document body explicitly contains the URL http://netcdn.co/app/431946152/how-to-get-free-robux-on-roblox-android-game-hack, which is a primary indicator of a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/how-to-get-free-robux-on-roblox-android-game-hack In PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/instant-robux-free_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-and-safe-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-holiday-crown-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/pokemon-go-free-upgrade_GM1094591345.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/robux-mod-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-girl-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-hacker-mask-tshirts-images_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-hacking-chrome-extension_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-robux-no-survey-or-download_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/drag-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-svg-images-free_GM479516143.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
font_00_sfnt_off00002ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC8 22184 bytes
SHA-256: 0e3dc54e0726bdac6504872e3dd99af7fedaeca847cd60270807707e00499332
font_01_sfnt_off00005c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3B 19352 bytes
SHA-256: e304df5bb787e5d781ba8df421338635027bcf17fc5b316d45060e4706135d6d

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