Malicious PDF — malware analysis report

Static analysis result for SHA-256 bacaf717d26767ba…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 17:54:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9ea3e5af1dab829418d9e7d6a02eff13 SHA-1: c422de8bcd2f520b7b2be73f8e7fc74901a55ab7 SHA-256: bacaf717d26767baa5fb693d325dff101d89e98bb4967c6e84c0c6f2362a780a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, which directs users to a page promising free game hacks. This indicates a social engineering lure designed to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/479516143/how-to-play-minecraft-for-free-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/hacks-para-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/gengreating-free-roblox-redeeem-codes_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/robux-free-no-fake-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/clicksfly-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-the-dump-work-at-a-pizza-place-money-hacks_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/cheat-roblox-november-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/robux-free-72-claim_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/hack-electric-state-darkrp-beta-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-tycoon-money-hack-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-counter-blox-cheats-crash_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/fiverr-roblox-cheat_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_off000031d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D3 22564 bytes
SHA-256: a6a8c06cf946855954fecd94a3f99fd59f27309b02ea695a78be91ba1de817ba
font_01_sfnt_off00006353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6353 18568 bytes
SHA-256: 6dc61538ed724bc6443f50b8479ccc6628e34517d99e5003dfe37ed8210b2c8a

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