Malicious PDF — malware analysis report

Static analysis result for SHA-256 260c1c59b1f78796…

MALICIOUS

PDF

43.2 KB Created: 2021-05-11 14:06:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 084b1e83f1e3824c3b94a79f23f131a9 SHA-1: d1939e42f34d67d7fbfa794686b647ada2e0430d SHA-256: 260c1c59b1f787967e14a72bbde27c82493c9fc6436361f93db41bf78f470eaf
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free currency, specifically mentioning 'Coin Master'. It contains multiple embedded links, including a critical redirector link to 'netcdn.xyz', which likely serves as a gateway to malicious content or phishing pages. The document also requests recovery secrets or private keys, indicating a strong potential for credential harvesting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/406889139/coin-master-free-redeem-code-game-hack In PDF document text
    • http://asiasieja.pl/images/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/javascript-free-robux_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_003_off000049e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E4 26020 bytes
SHA-256: cc8b6c8c8c230711ad0d38bee12a6a87b5da5d06fb8383d2994bc7a4a4ee3151
font_01_sfnt_off0000870f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870F 18144 bytes
SHA-256: 5bbd7c38c96c77c4f9f35a136dd3471001d40e5cdd485746050297559c8b8e4d

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