Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed20dc9293e20496…

MALICIOUS

PDF

251.3 KB Created: 2021-07-06 17:37:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 20e7675ef0bc1171669460ea528f485d SHA-1: dc873f41fa8a1fc79f32a897625cc25412fdf270 SHA-256: ed20dc9293e20496352fbcfab6dfbb4e83bbaece6b06f04aeda15dcc20175d94
218 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple heuristics indicating a lure for free game currency and a fake CAPTCHA, designed to trick users into clicking a malicious link. The primary malicious URL identified is http://netcdn.tw/app/1330123889/pubg-600-uc-in-pakistani-rupees-game-hack, which is flagged as a known malicious redirector. The presence of MFA/one-time-code harvesting lures suggests a potential phishing attempt to steal credentials or session tokens.

Machine Learning

  • Nyx PDF Classifier clean score 0.0098

Heuristics 7

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/1330123889/pubg-600-uc-in-pakistani-rupees-game-hack In PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/galaxy-hair-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/como-conseguir-robux-en-roblox-sin-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-kohls-admin-hack_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-saber-sim-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/10-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/cheat-dbr-roblox-ccv3-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-roblox-executer-purple-bunny_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/r2d-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-yahoo-answers_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/cant-hacking-to-pokes-acount-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-someone-hacked-a-server_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-credit-card-free_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-hack-meep-city_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-elizabeth-songs_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_024_off00037e95.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37E95 26028 bytes
SHA-256: c60b10d9fd3d6cd6302649e1e869df69fd1031c609ed86c439fd3fc027186b8f
font_01_sfnt_off0003bbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BBE4 19036 bytes
SHA-256: eb2e2c9104a9bc41a1d7969a8c551597e26a9ebcd449de41376900836f713561

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