Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b57fd4320a575fd…

MALICIOUS

PDF

40.5 KB Created: 2021-05-21 17:31:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d7541fa196dd8f2a58703c92fb66e117 SHA-1: 3bd9e32e90d8aa923d9091f7cc40b715b695cd4b SHA-256: 2b57fd4320a575fd82624f44c1bd67aff378b318b8b6fa010e9662dcb6e87520
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a primary redirector URL associated with 'free generator / game hack' lures. The document body reinforces this by mentioning 'Free Roblox Accounts' and 'Roblox Generator', indicating a social engineering tactic to trick users into clicking malicious links. The presence of embedded URLs and the ML classifier's high confidence score suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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 https://netcdn.xyz/app/431946152/free-roblox-accounts-with-robux-that-work-2021-game-hack In PDF document text
    • https://belixconstructions.com.au/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://belixconstructions.com.au/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://belixconstructions.com.au/images/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://belixconstructions.com.au/images/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://belixconstructions.com.au/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000035b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35B3 30516 bytes
SHA-256: 19ac20e9c1fe40355d9ff7ec85c3ec47c9903b0e3143589dc570f371fe998b52
font_01_sfnt_off000079a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A9 19476 bytes
SHA-256: 4c7cb67921980cc467a624d7be0aa4f8f19dcdcb8d4cb789adc94de6f70366aa

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