Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f14301d223aa1a…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 12:35:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6b8384a19c73cf3ef3f88a499843754b SHA-1: 9cbc41aa0bb37971965531b3dafd87a345399a1e SHA-256: c4f14301d223aa1abf6ce0cc855789b6186cfbec245dc542116dfa85ad172ef5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure related to 'free Robux' and directs users to a URL that promises a generator or hack. This is a common social engineering tactic to trick users into visiting malicious sites or downloading further payloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-without-downloading-any-apps-game-hack PDF link annotation
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-shirts-images_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/roblox-women-free-hair_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/moon-active_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-any-item-for-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/cheat-jailbreak-rush-hacked-roblox_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/unlockmygamescom-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/roblox-super-power-training-hack_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-simple_GM431946152.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_off000033cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33CF 21836 bytes
SHA-256: 627044ec965e09a850a7f154b443635e9485f5c2b4382d04f16c4cca83ef481a
font_01_sfnt_off000063e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E7 20240 bytes
SHA-256: 297e40e48bf98f909157546786ed8ef6c846caf78719244298106c3264496c18

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