Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28e677fa286bb45…

MALICIOUS

PDF

38.9 KB Created: 2021-05-22 01:44:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 00a4d84b577b9cc69bd39a1a9d2f14ff SHA-1: 8ca8af4ea26add1b034556cde8f87fef6f73d7db SHA-256: a28e677fa286bb4543a1d7f42893785c8dc98c392c212ea5e06d7e3debc11066
160 Risk Score

Malware Insights

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

The PDF contains multiple links to malicious redirectors disguised as "game hacks" or "generators", aiming to lure users to malicious websites. The document body explicitly mentions "How To Hack Roblox Accounts" and "CLICK HERE TO ACCESS ROBLOX GENERATOR", reinforcing the social engineering aspect. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to exploit user interest in free game-related 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/how-to-hack-roblox-accounts-2021-easy-game-hack In PDF document text
    • http://britishcomics.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/50-000-free-spins-coin-master_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_off000036d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36D8 26096 bytes
SHA-256: 8bc346277f11a29e9af7395febe4df07aa7a6a436c46bb56ef18ddfc759f8098
font_01_sfnt_off000073d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D3 19172 bytes
SHA-256: 0a4c192dd0d49b475d670e2028b2e3d9bc88486e58824ff416e2d46c0acce708

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