Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef4fee5b003d210…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 08:54:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4b17066eebb0087782b3139977d38d9b SHA-1: 7c4482b676438935c77b2195358c0b4ab22983e1 SHA-256: aef4fee5b003d2103f38dce6176821ff2ee5c3225c9f31f05868e83f39912385
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free generators' to entice users. The document body and extracted URLs suggest a social engineering lure to download potentially unwanted or malicious software. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirector workflow.

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-hack-minecraft-pe-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-how-to-hack-people-39_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-50-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-the-pizzeria-rp-remastered-give-all-coins-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hacks-download-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-4k-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-pink-hair_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-account-roblox-2021-obc_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/anything-free-on-the-catalog-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-inspect-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-proget-games_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_off000033b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B1 22332 bytes
SHA-256: 715d5b97ed30307475e7e4a039f7cceabd8291a5a4af080ec8a78414af6a8fdd
font_01_sfnt_off00006517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6517 18488 bytes
SHA-256: 219457e29f33dfec07786a29e70830a20555f796e9e6bb3f533c171663b580ef

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