Malicious PDF — malware analysis report

Static analysis result for SHA-256 c438aa5fcd4bdeca…

MALICIOUS

PDF

42.6 KB Created: 2021-05-14 18:06:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1a87ab151839b69a89dc0a7d86e48303 SHA-1: 98171347c1acf61e26932d6d6feffaf19ec538ac SHA-256: c438aa5fcd4bdecabaa85979d29cda6df8cf294362dbf099b2397e60d234716d
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirectors and lures users with the promise of game hacks, consistent with a phishing or malware distribution scheme. The embedded URL `https://netcdn.xyz/app/479516143/minecraft-bedrock-download-game-hack` is a primary indicator of this malicious activity. Although no scripts were explicitly extracted, the presence of PDF-specific malicious link heuristics suggests an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://netcdn.xyz/app/479516143/minecraft-bedrock-download-game-hack In PDF document text
    • http://magnipsor.su/images/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/free-coin-master-spins-blog_GM406889139.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_003_off000047a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A3 25712 bytes
SHA-256: e46b0285356fbc8c8165f00e8655598de0c9f0614b21770a4cef89d1a0577918
font_01_sfnt_off00008303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8303 18676 bytes
SHA-256: 71d03cd911f296367a63c790b96900f67ec797f491b3f6a6ddf408856ea79078

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