Malicious PDF — malware analysis report

Static analysis result for SHA-256 62693b854455dfc0…

MALICIOUS

PDF

54.7 KB Created: 2021-06-10 21:05:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ebbc15ef57ec4132380f1ca3a4fdeeea SHA-1: f5c1636778ca314a4756454e3e54390191c63285 SHA-256: 62693b854455dfc0e0708279f45bac0529af0171c22c52089bbae175db47f93f
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and impersonates Facebook to lure users with a 'free Robux' offer. The document body, though heavily obfuscated, contains references to game hacks and generators, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9649

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/how-to-get-free-robux-no-hack-or-survey-jessieplays-game-hack.
  • 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.tw/app/431946152/how-to-get-free-robux-no-hack-or-survey-jessieplays-game-hack In PDF document text
    • http://librarysenior.com//repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/dbor-roblox-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-levitation-animation-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/get-gold-coin-master-village-hack_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005444.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5444 37988 bytes
SHA-256: 0dea11867b9b6399122b1ba579cbc33dc215d74bff67bd074bb8388d0c37dcff
font_01_sfnt_off0000a646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA646 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off0000aff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF4 19508 bytes
SHA-256: 9320e4d519cee0f26e5d34ef16011bed6fc24f2e044871700e2b6b84e3b120ae

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