Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2818bc7531128ed…

MALICIOUS

PDF

34.3 KB Created: 2021-06-20 04:21:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b0c8f6b55f3b77d39d13003f9e625375 SHA-1: 96dfaf8ca18fedd2d67fbefd7e05a2a6f84ee43c SHA-256: f2818bc7531128ed55da9239b61472e6f92e59073fa74209825dc43f655513e7
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites promising free in-game currency and hacks, including a link to a known malicious redirector. The document body explicitly mentions 'How To Get Free Roubux For Roblox' and includes URLs that are part of a link farm designed to attract users searching for game cheats. This indicates a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://netcdn.co/app/431946152/how-to-get-free-roubux-for-roblox-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-free-avatar-editor_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-how-to-make-thumbnail-for-free_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/hack-robar-cuentas-de-roblox-akaka_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-free-robux-cheat-engine_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-gets-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/www-robux-cheat-us_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/be-a-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/robux-earning-sites_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
font_00_sfnt_off00002f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3D 22320 bytes
SHA-256: befc043e2ffd6ee64d3e7ad9b847cfe3d1331f6c9b055eb46127c9f31c0eff3a
font_01_sfnt_off000060e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E2 19056 bytes
SHA-256: 5c1d5b2faf69a0f68f8c5a6a53d52e639c35907fc91079f1143cc6400c13c0b8

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