Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8de5032648a7277…

MALICIOUS

PDF

45.0 KB Created: 2021-05-13 18:04:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: af78c26b43c1423c19543a5962b2e34e SHA-1: 36f62f63d7a6fbb5ad591d3664f012d68f4df2e4 SHA-256: e8de5032648a727728a19144ed274bb17bbae1c2936cc4a16eaa97d6d448cbbe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks or free generators. The heuristic firings confirm the presence of malicious redirector links and a lure for free generators. The document body, though heavily obfuscated, contains references to the malicious URL, reinforcing the social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/fbchampion-com-game-hack In PDF document text
    • http://reggieslockandkey.com/images/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux-redeem_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-home_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b23.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B23 24936 bytes
SHA-256: 1880056dd6d368ba856087692aef047867c31d6c2e87dcb56ccff2d5f09e4260
font_01_sfnt_off000083a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A4 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8F 18364 bytes
SHA-256: bf4d3a5aac758f6c252762087d30972ef460d96304da6a0413f0eeb503c51fa6

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