Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6990459e3e07472…

MALICIOUS

PDF

46.4 KB Created: 2021-05-13 22:21:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: dcaada28376d8375ac127a4cbe88444f SHA-1: 04ad4fe188a248fe911f3e76349483f98f0db6d8 SHA-256: c6990459e3e074728dc6bc021b72c3c22000423cb0cf4e609a789a062cefea58
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that lead to a known malicious redirector infrastructure, specifically promoting 'free Robux' and game hacks. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious links and the nature of the lure strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-robux-redeem-codes-2021-game-hack In PDF document text
    • http://www.dimalcco.com/images/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.dimalcco.com/images/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://www.dimalcco.com/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://www.dimalcco.com/images/blox-rewards_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.dimalcco.com/images/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/hack-xp-net-generators-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A0 27672 bytes
SHA-256: 94d49019f2b0f50513f62ff5d0b0a63a9d6b0b0c1ec3c4d5503fa3a2aeaa1e98
font_01_sfnt_off00008790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8790 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9141 18852 bytes
SHA-256: 835008e062f354a08c5cd285c30dce0b291468b55589a8f36d5d300bab70ed7b

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