Malicious PDF — malware analysis report

Static analysis result for SHA-256 843a704b500f708c…

MALICIOUS

PDF

33.4 KB Created: 2021-07-05 18:33:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0d3200a342c36cabed78874e5c965a21 SHA-1: 94a919c6a0972279838228df1caa96a9c1a03ce5 SHA-256: 843a704b500f708cfa1ffc248a303d91c35122e5cf4cee9f22ee704f08909e5e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector, disguised as a 'free generator' or 'game hack'. The document body explicitly mentions 'free Robux' and 'game hack', indicating a lure for users seeking in-game advantages. The presence of these links and the lure strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful content.

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.tw/app/431946152/how-to-get-free-robux-on-iphone-no-human-verification-game-hack In PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-sharkbite-hack-script-pastebin-money_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/how-many-tiktok-free-folowers-make_GM835599320.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-money-hack-on-roblox-car-simulator_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/hack-para-roblox-2021-mayo_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/pokemon-go-free-mewtwo_GM1094591345.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_off00002c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4A 21664 bytes
SHA-256: b6f479e84066b5102dae891778dedd4fab03cd5805eb7349990e49e690e532c3
font_01_sfnt_off00005b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B94 19840 bytes
SHA-256: 78cf845991797c1eae55a8311ca28228dfebfc8c4dad2c0208197c895c6448a2

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