Malicious PDF — malware analysis report

Static analysis result for SHA-256 232ec42617d1a162…

MALICIOUS

PDF

46.2 KB Created: 2021-05-20 00:31:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 17f9af6cea9f201deda029c6c8430ce5 SHA-1: 16ca2fba7b9f800e7981235744f59592bd0be1dc SHA-256: 232ec42617d1a162da4f5fb6bb3c44fd67d35604cdf68850021a68ec4b5e944d
200 Risk Score

Malware Insights

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

This PDF document employs social engineering tactics, presenting a fake CAPTCHA and a lure for game hacks to entice users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, suggesting an attempt to download further malicious content or redirect to phishing sites. The document body contains multiple URLs that appear to be part of this lure, likely leading to malware or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9278

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.
  • 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
  • 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/431946152/how-to-hack-a-roblox-account-easy-game-hack In PDF document text
    • http://apx-centre.ru/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-verification_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B3 27368 bytes
SHA-256: 639a012d4a0fb7bc701d2a2eab0c16d726389e2e05211cec2016083d98b55844
font_01_sfnt_off000086d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D5 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00009084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9084 18772 bytes
SHA-256: f0aa2a8f008262e8aa636f08cdffff7c9568ae6e0bf5f389be1472b9a6879674

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