Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b5c59db371e939…

MALICIOUS

PDF

36.8 KB Created: 2021-05-20 19:46:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9efcaeff60aae012c5a065c94c47fcc7 SHA-1: 2e3b10b101fef20738b74c4b6ba91b00c2c4041d SHA-256: 69b5c59db371e9392cd1c231601842925c1a7dbd37531368706b613c5b85d6c2
200 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, including one disguised as a 'free stuff on Roblox' generator. The document body also contains a call-to-action phrase and references to 'Roblox Generator', consistent with a phishing or scam lure. The presence of MFA lure heuristics suggests an attempt to harvest session tokens or abuse multi-factor authentication, likely facilitated by the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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-stuff-on-roblox-game-hack In PDF document text
    • http://arpinoturismo.it/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-tiktok-invitation-template_GM835599320.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_002_off00003427.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3427 25336 bytes
SHA-256: e74a3d525f3f73fced291c9738a764bab607bc89dd86136c5b9ae3c8ad450503
font_01_sfnt_off00006eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEF 18192 bytes
SHA-256: 903941a417559e7684521db1d707d12e6b393a834b1c6361693a3f5a10f7088f

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