Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8eea4b687aa9f7…

MALICIOUS

PDF

45.1 KB Created: 2021-05-17 19:31:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 248011237c115f64aec0ba82bdec69c2 SHA-1: 355eed30e1116223dfec5559d162bcbe396db713 SHA-256: 3e8eea4b687aa9f7b0598606c6f3d40e360312e4b8559b3c84ef175633819f51
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector, masquerading as a 'free Robux giveaway' or game hack. The document body and heuristics indicate a lure to download or visit sites related to game cheats and currency. The embedded links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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.
  • 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.
  • 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-giveaway-game-hack In PDF document text
    • http://gods-own.org/images/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://gods-own.org/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/robux-online_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-hack-pc-free_GM406889139.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_off000048d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D9 24860 bytes
SHA-256: 5e2ea1370b9079c5da85aeb3369e9c085f77e03fec3c8ce37d98ccddcdd54c8a
font_01_sfnt_off000081f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F2 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDD 18820 bytes
SHA-256: a907981f6338d23acda294c558170907db38f399f16fdb2ca0bc536a0b707f6d

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