Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa85650fbf05103…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 00:48:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a6ef66e8a306e85bd4ee9c2db64c5504 SHA-1: 27a9402cf5ce3471fa38570b14c75e0a31a938ea SHA-256: 1fa85650fbf051031417615602313b22fda8ff28f82be06b64bde8475303c2ee
160 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a game hack generator, which is a common lure for phishing or malware delivery. This link redirects to a known malicious domain, indicating a likely attempt to lead the user to a malicious website or download. The ML classifier also strongly flagged this PDF as malicious.

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/406889139/coin-master-free-coins-today-game-hack In PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/how-to-make-your-roblox-game-famous-for-free_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/roblox-free-superhero-body_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/tuto-comment-installer-des-hacks-pour-roblox_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/roblox-cheats-commands_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-gametest-roblox-com_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/mathep_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/free-roblox-gift-card-codes-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/roman-colosseum-roblox-free-model_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/robux-boost_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/new-cheat-engine-2021-working-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/free-robux-tix_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/codes-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/free-robux-legit-2021_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/how-do-you-earn-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning1.man1mempawah.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021_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
stream_002_off0000325b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x325B 22652 bytes
SHA-256: c1b7bf504b42bf7521cd938891f73dd75d55dfb28a388f283e335c02cd3d29f0
font_01_sfnt_off000064ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CA 18352 bytes
SHA-256: 4436e71a69cc84908d54640a01fc878fc6589f186e334144e7e9ae00d8ddcef6

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